laravel开启跨域
//对于跨域访问并需要伴随认证信息的请求，需要在 XMLHttpRequest 实例中指定 withCredentials 为 true,在响应中指定 Access-Control-Allow-Credentials 为 true 时，Access-Control-Allow-Origin 不能指定为 *
<?php namespace App\Http\Middleware;
use Closure;
use Response;
class EnableCrossRequestMiddleware {
/**
* Handle an incoming request.
*
* @param \Illuminate\Http\Request $request
* @param \Closure $next
* @return mixed
*/
public function handle($request, Closure $next)
{
$response = $next($request);
$response->header('Access-Control-Allow-Origin', config('app.allow'));
$response->header('Access-Control-Allow-Headers', 'Origin, Content-Type, Cookie, Accept');
$response->header('Access-Control-Allow-Methods', 'GET, POST, PATCH, PUT, OPTIONS');
$response->header('Access-Control-Allow-Credentials', 'true');
return $response;
}
}laravel自定义artisan命令
//命令生成文件 app/Console/Commands/TopicMakeExcerptCommand.php
php artisan make:console TopicMakeExcerptCommand --command=topics:excerpt
<?php
namespace App\Console\Commands;
use Illuminate\Console\Command;
class TopicMakeExcerptCommand extends Command
{
/**
* 1. 这里是命令行调用的名字, 如这里的: `topics:excerpt`,
* 命令行调用的时候就是 `php artisan topics:excerpt`
*
* @var string
*/
protected $signature = 'topics:excerpt';
/**
* 2. 这里填写命令行的描述, 当执行 `php artisan` 时
* 可以看得见.
*
* @var string
*/
protected $description = '这里修改为命令行的描述';
/**
* Create a new command instance.
*
* @return void
*/
public function __construct()
{
parent::__construct();
}
/**
* 3. 这里是放要执行的代码, 如在我这个例子里面,
* 生成摘要, 并保持.
*
* @return mixed
*/
public function handle()
{
$topics = Topic::all();
$transfer_count = 0;
foreach ($topics as $topic) {
if (empty($topic->excerpt))
{
$topic->excerpt = Topic::makeExcerpt($topic->body);
$topic->save();
$transfer_count++;
}
}
$this->info("Transfer old data count: " . $transfer_count);
$this->info("It's Done, have a good day.");
}
}
//在 app/Console/Kernel.php 文件里面, 添加以下
protected $commands = [
\App\Console\Commands\TopicMakeExcerptCommand::class,
];
//命令行调用
php artisan topics:excerpt
去除CSRF TOKEN的保护
Route::post('wechatmp', 'WechatController@responseMsg');
class VerifyCsrfToken extends BaseVerifier
{
protected $except = [
'wechatmp',
];
}DateTime非常方便快捷地计算出两个日期的diff
$datetime1 = new DateTime();
$datetime2 = new DateTime('2018-08-16');
$interval = $datetime1->diff($datetime2);
list($y, $m, $d) = explode('-', $interval->format('%Y-%m-%d'));
echo "距世界杯还有{$y}年{$m}个月{$d}天";
$now=time();
$end=strtotime('2018-8-16 00:00:00');
$d=$end-$now;
$y = date('Y', $d) - 1970;
$m = date('n', $d) - 1;
$d = date('j', $d) - 1;
printf('还有%d年%d月%d天', $y, $m, $d);php里简单的对称加密算法
$content = "大家好，我是中国人，你是谁";
/**
* 简单对称加密算法之加密
* @param String $string 需要加密的字串
* @param String $skey 加密EKY
* @return String
*/
function encode($string = '', $skey = 'wenzi') {
$strArr = str_split(base64_encode($string));
$strCount = count($strArr);
foreach (str_split($skey) as $key => $value)
$key < $strCount && $strArr[$key].=$value;
return str_replace(array('=', '+', '/'), array('O0O0O', 'o000o', 'oo00o'), join('', $strArr));
}
/**
* 简单对称加密算法之解密
* @param String $string 需要解密的字串
* @param String $skey 解密KEY
* @return String
*/
function decode($string = '', $skey = 'wenzi') {
$strArr = str_split(str_replace(array('O0O0O', 'o000o', 'oo00o'), array('=', '+', '/'), $string), 2);
$strCount = count($strArr);
foreach (str_split($skey) as $key => $value)
$key <= $strCount && $strArr[$key][1] === $value && $strArr[$key] = $strArr[$key][0];
return base64_decode(join('', $strArr));
}
echo '<pre>';
echo "string : " . $content . " <br />";
echo "encode : " . ($enstring = encode($content)) . '<br />';
echo "decode : " . decode($enstring);laravel eloquent 一对一关联后根据副表中的字段来排序
GoodsData::with('good')->whereHas('good', function($q) use ($brandId) {
$q->where('brand_id', $brandId)
})->orderBy('click_count', 'desc')->paginate();
$goodIds = GoodsData::whereHas('good', function($q) use ($brandId) {
$q->where('brand_id', $brandId)
})->orderBy('click_count', 'desc')->skip(10)->take(15)->pluck('id');
$goods = Good::whereIn('id', $goodIds)->get();
数字运算
function calc($m,$n,$x){
$errors=array(
'被除数不能为零',
'负数没有平方根'
);
switch($x){
case 'add':
$t=bcadd($m,$n);
break;
case 'sub':
$t=bcsub($m,$n);
break;
case 'mul':
$t=bcmul($m,$n);
break;
case 'div':
if($n!=0){
$t=bcdiv($m,$n);
}else{
return $errors[0];
}
break;
case 'pow':
$t=bcpow($m,$n);
break;
case 'mod':
if($n!=0){
$t=bcmod($m,$n);
}else{
return $errors[0];
}
break;
case 'sqrt':
if($m>=0){
$t=bcsqrt($m);
}else{
return $errors[1];
}
break;
}
$t=preg_replace("/\..*0+$/",'',$t);
return $t;
}
/*用法举例*/
echo calc('11111111111111111111111111111111110','10','add');计算2点经纬度之间的距离代码
function getDistanceBetweenPointsNew($latitude1, $longitude1, $latitude2, $longitude2) {
$theta = $longitude1 - $longitude2;
$miles = (sin(deg2rad($latitude1)) * sin(deg2rad($latitude2))) + (cos(deg2rad($latitude1)) * cos(deg2rad($latitude2)) * cos(deg2rad($theta)));
$miles = acos($miles);
$miles = rad2deg($miles);
$miles = $miles * 60 * 1.1515;
$feet = $miles * 5280;
$yards = $feet / 3;
$kilometers = $miles * 1.609344;
$meters = $kilometers * 1000;
return compact('miles','feet','yards','kilometers','meters');
}
$point1 = array('lat' => 40.770623, 'long' => -73.964367);
$point2 = array('lat' => 40.758224, 'long' => -73.917404);
$distance = getDistanceBetweenPointsNew($point1['lat'], $point1['long'], $point2['lat'], $point2['long']);
foreach ($distance as $unit => $value) {
echo $unit.': '.number_format($value,4).'<br />';
}
计算抽奖的概率
function get_rand($proArr) {
$result = '';
$proSum = array_sum($proArr);
foreach ($proArr as $key => $proCur) {
$randNum = mt_rand(1, $proSum);
if ($randNum <= $proCur) {
$result = $key;
break;
} else {
$proSum -= $proCur;
}
}
unset ($proArr);
return $result;
}
$prize_arr = array(
'0' => array('id'=>1,'prize'=>'1000000514','v'=>2),
'1' => array('id'=>2,'prize'=>'1000000513','v'=>5),
'2' => array('id'=>3,'prize'=>'1000000512','v'=>13),
'3' => array('id'=>4,'prize'=>'1000000511','v'=>15),
'4' => array('id'=>5,'prize'=>'1000000510','v'=>25),
'5' => array('id'=>6,'prize'=>'1000000509','v'=>30),
'6' => array('id'=>7,'prize'=>'1000000508','v'=>10),
);
foreach ($prize_arr as $key => $val) {
$arr[$val['id']] = $val['v'];
}
$rid = get_rand($arr);
$res['yes'] = $prize_arr[$rid-1]['prize'];
unset($prize_arr[$rid-1]);
shuffle($prize_arr);
$prize_arrcount = count($prize_arr);
for($i=0;$i<$prize_arrcount;$i++){
$pr[] = $prize_arr[$i]['prize'];
}
$res['no'] = $pr;
//抽奖结果
$ro = $res['yes'];
print_r($ro); 一维数据转多维
$s =<<< TXT
1 = 光电鼠标
2 = 机械鼠标
3 = 没有鼠标
1.1 = 黑色光电鼠标
1.2 = 红色光电鼠标
1.2.1 = 蓝牙红色光电鼠标
TXT;
$res = array();
foreach(preg_split("/[\r\n]+/", $s) as $r) {
list($k, $txt) = explode(' = ', $r);
$p =& $res;
foreach(explode('.', $k) as $v) {
if(! isset($p[$v])) $p[$v] = array('txt' => $txt, 'child' => array());
$p =& $p[$v]['child'];
}
}
print_r($res); 打乱数组二维数组/多维数组
function shuffle_assoc($list) {
if (!is_array($list)) return $list;
$keys = array_keys($list);
shuffle($keys);
$random = array();
foreach ($keys as $key)
$random[$key] = shuffle_assoc($list[$key]);
return $random;
}
function rec_assoc_shuffle($array)
{
$ary_keys = array_keys($array);
$ary_values = array_values($array);
shuffle($ary_values);
foreach($ary_keys as $key => $value) {
if (is_array($ary_values[$key]) AND $ary_values[$key] != NULL) {
$ary_values[$key] = rec_assoc_shuffle($ary_values[$key]);
}
$new[$value] = $ary_values[$key];
}
return $new;
}
curl 上传文件
$curl = curl_init();
if (class_exists('\CURLFile')) {// 这里用特性检测判断php版本
curl_setopt($curl, CURLOPT_SAFE_UPLOAD, true);
$data = array('file' => new \CURLFile(realpath($source)));//>=5.5
} else {
if (defined('CURLOPT_SAFE_UPLOAD')) {
curl_setopt($curl, CURLOPT_SAFE_UPLOAD, false);
}
$data = array('file' => '@' . realpath($source));//<=5.5
}
curl_setopt($curl, CURLOPT_URL, $url);
curl_setopt($curl, CURLOPT_POST, 1 );
curl_setopt($curl, CURLOPT_POSTFIELDS, $data);
curl_setopt($curl, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($curl, CURLOPT_USERAGENT,"TEST");
$result = curl_exec($curl);
$error = curl_error($curl);数字递归组合并排列
function recursion($groups, $echo = '')
{
$current = array_pop($groups);
$end = empty($groups);
$echo .= $echo ? ',' : '';
foreach (str_split($current) as $item) {
$rEcho = $echo . $item;
if ($end) {
echo $rEcho . "\n";
} else {
recursion($groups, $rEcho);
}
}
}
recursion(explode(',', '123,45,6789'));php超出字符截取
$text = '123456';
$charLength = 10; //字符串长度
$content = mb_strlen($text, 'UTF-8') <= $charLength ? $text : mb_substr($text, 0,$charLength,'UTF-8') . '...';post json
// form post json
$ch = curl_init();
$timeout = 300;
$useragent = "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1)";
curl_setopt($ch, CURLOPT_HTTPHEADER, $header);
curl_setopt($ch, CURLOPT_USERAGENT, $useragent);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
$json = '{"name":"value"}';
$data['data'] = $json;
$data = http_build_query($data);
curl_setopt($ch, CURLOPT_URL, 'http://www.test.com/json.php');
curl_setopt($ch, CURLOPT_POST, TRUE);
curl_setopt($ch, CURLOPT_POSTFIELDS, $data);
curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, $timeout);
$body = curl_exec($ch);
echo '<pre>';print_r($body);
//json.php
var_dump($_POST);
// 正确的post json
$ch = curl_init();
$timeout = 300;
$useragent = "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1)";
$header = array(
'Accept-Language: zh-cn',
'Connection: Keep-Alive',
'Cache-Control: no-cache',
'Content-Type: Application/json;charset=utf-8'
);
curl_setopt($ch, CURLOPT_HTTPHEADER, $header);
curl_setopt($ch, CURLOPT_USERAGENT, $useragent);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
$json = '{"name":"value"}';
curl_setopt($ch, CURLOPT_URL, 'http://www.test.com/json.php');
curl_setopt($ch, CURLOPT_POST, TRUE);
curl_setopt($ch, CURLOPT_POSTFIELDS, $json);
curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, $timeout);
$body = curl_exec($ch);
echo '<pre>';print_r($body);
//json.php
var_dump(file_get_contents('php://input'));
#curl命令行 post json
#获取本机ip地址
$ curl http://httpbin.org/ip
{"origin": "24.127.96.129"}
$ curl -X POST -d '{"name":"value"}' -H "Content-type: application/json" "http://httpbin.org/post"
{
"args": {},
"data": "{\"name\":\"value\"}",
"files": {},
"form": {},
"headers": {
"Accept": "*/*",
"Content-Length": "16",
"Content-Type": "application/json",
"Host": "httpbin.org",
"User-Agent": "curl/7.30.0"
},
"json": {
"name": "value"
},
"origin": "43.255.178.126",
"url": "http://httpbin.org/post"
}
#python post json
>>> import requests,json
>>> headers = {'content-type': 'application/json'}
>>> payload = {'name': 'value'}
>>> r = requests.post('http://httpbin.org/post', data=json.dumps(payload), headers=headers)
>>> print(r.json())
为 VerifyCsrfToken 添加过滤条件
//修改 app/Http/Middleware/VerifyCsrfToken.php 文件
<?php
namespace App\Http\Middleware;
use Illuminate\Foundation\Http\Middleware\VerifyCsrfToken as BaseVerifier;
use Closure;
class VerifyCsrfToken extends BaseVerifier
{
/**
* The URIs that should be excluded from CSRF verification.
*
* @var array
*/
protected $except = [
//
];
public function handle($request, Closure $next)
{
// 如果是来自 api 域名，就跳过检查
if ($_SERVER['SERVER_NAME'] != config('api.domain'))
{
return parent::handle($request, $next);
}
return $next($request);
}
}自定义一个类文件让composer加载
//修改composer.json文件：
{
"require": {
"illuminate/container": "^5.2"
},
"autoload": {
"psr-4": {
"App\\": "app/"
}
}
}
#composer install
// app/Test/Test.php文件
namespace App\Test;
class Test
{
public function index()
{
echo "This is a custom class which will be autoload by composer\n";
}
}
//index.php
require_once __DIR__.'/vendor/autoload.php';
$test = new App\Test\Test();
$test->index();利用 macro 方法来扩展 Laravel 的基础类的功能
//创建一个ServiceProvider，并把扩充的方法，放入boot()的方法中
namespace App\Providers;
use Collection;
use Illuminate\Support\ServiceProvider;
class CollectionMacroServiceProvider extends ServiceProvider {
public function boot()
{
Collection::macro('uppercase', function () {
//$this不是指向你文件类的对象，而是指向你marco扩充的类。比如例子中的$this是指向Collection的。
return collect($this->items)->map(function ($item) {
return strtoupper($item);
});
});
}
}
//在config/app.php中的providers中下面添加App\ProvidersCollectionMacroServiceProvider::class即可从现有数据库表中生成 Model 模型文件
composer require ignasbernotas/laravel-model-generator
在 app/Providers/AppServiceProvider.php 文件的 register 方法里面，加入如下代码
public function register()
{
if ($this->app->environment() == 'local') {
$this->app->register('Iber\Generator\ModelGeneratorProvider');
}
}
php artisan make:models数组扁平化
$arrays = array(0 => Array (
0 => Array (
'社员' => 2,
0 => 'level4'
),
1 => Array (
'社员' => 2,
0 => 'level4',
1 => 'level4'
)
),
1 => Array (
0 => Array (
'小组长' => 2,
0 => 'level3'
),
1 => Array (
'小组长' => 2,
0 => 'level3',
1 => 'level2',
2 => 'level3'
)
)
);
dd(collect($arrays)->map(function($array){
return $array[1]; //比如都取最里面数组的第二个值
})->flatten(1));
Laravel 单点登录
php artisan make:middleware SsoMiddleware
将中间件添加到 Kernel.php
protected $routeMiddleware = [
'auth' => \App\Http\Middleware\Authenticate::class,
'auth.basic' => \Illuminate\Auth\Middleware\AuthenticateWithBasicAuth::class,
'guest' => \App\Http\Middleware\RedirectIfAuthenticated::class,
'SsoMiddleware' => \App\Http\Middleware\index\SsoMiddleware::class,
];
/**
* Handle an incoming request.
*
* @param \Illuminate\Http\Request $request
* @param \Closure $next
* @return mixed
*/
public function handle($request, Closure $next)
{
$userInfo = \Session::get('user_login');
if ($userInfo) {
// 获取 Cookie 中的 token
$singletoken = $request->cookie('SINGLETOKEN');
if ($singletoken) {
// 从 Redis 获取 time
$redisTime = \Redis::get(STRING_SINGLETOKEN_ . $userInfo->guid);
// 重新获取加密参数加密
$ip = $request->getClientIp();
$secret = md5($ip . $userInfo->guid . $redisTime);
if ($singletoken != $secret) {
// 记录此次异常登录记录
\DB::table('data_login_exception')->insert(['guid' => $userInfo->guid, 'ip' => $ip, 'addtime' => time()]);
// 清除 session 数据
\Session::forget('indexlogin');
return view('/403')->with(['Msg' => '您的帐号在另一个地点登录..']);
}
return $next($request);
} else {
return redirect('/login');
}
} else {
return redirect('/login');
}
}
// 有 Sso 中间件的路由组
Route::group(['middleware' => 'SsoMiddleware'], function() {
# 用户登录成功后的路由
}curl ssl
$url="https://api.shanbay.com/bdc/search/?word=hello";
$ch=curl_init();
$timeout=5;
curl_setopt($ch,CURLOPT_URL,$url);
curl_setopt($ch,CURLOPT_RETURNTRANSFER,1);
curl_setopt($ch,CURLOPT_SSL_VERIFYHOST,2);
curl_setopt($ch,CURLOPT_SSL_VERIFYPEER,false);
curl_setopt($ch,CURLOPT_CONNECTTIMEOUT,$timeout);
$data=curl_exec($ch);
curl_close($ch);
echo $data;base64_encode进行编码.同时替换其中的不安全字符
//处理为URL安全模式
function reflowURLSafeBase64($str){
$str=str_replace("/","_",$str);
$str=str_replace("+","-",$str);
return $str;
}
//反解
function reflowNormalBase64($str){
$str=str_replace("_","/",$str);
$str=str_replace("-","+",$str);
return $str;
}PHP无限级分类
function data_to_tree(&$items, $topid = 0, $with_id = TRUE)
{
$result = [];
foreach($items as $v)
if ($topid == $v['parent']) {
$r = $v + ['children' => _data_to_tree($items, $v['id'], $with_id)];
if ($with_id)
$result[$v['id']] = $r;
else
$result[] = $r;
}
return $result;
}
function _data_to_tree($items, $topid = 0, $with_id = TRUE)
{
if ($with_id)
foreach ($items as $item)
$items[ $item['parent'] ]['children'][ $item['id'] ] = &$items[ $item['id'] ];
else
foreach ($items as $item)
$items[ $item['parent'] ]['children'][] = &$items[ $item['id'] ];
return isset($items[ $topid ]['children']) ? $items[ $topid ][ 'children' ] : [];
}
$data = [
['id' => 4, 'parent' => 1 , 'text' => 'Parent1'],
['id' => 1, 'parent' => 0 , 'text' => 'Root'],
['id' => 2, 'parent' => 1 , 'text' => 'Parent2'],
['id' => 3, 'parent' => 2 , 'text' => 'Sub1'],
];
print_r ( _data_to_tree($data, 0) );
Array
(
[1] => Array
(
[id] => 1
[parent] => 0
[text] => Root
[children] => Array
(
[4] => Array
(
[id] => 4
[parent] => 1
[text] => Parent1
[children] => Array
(
)
)
[2] => Array
(
[id] => 2
[parent] => 1
[text] => Parent2
[children] => Array
(
[3] => Array
(
[id] => 3
[parent] => 2
[text] => Sub1
[children] => Array
(
)
)
)
)
)
)
)判断是否为json格式
function is_json($string)
{
json_decode($string);
return (json_last_error() == JSON_ERROR_NONE);
//return json_encode($json)!==false
}
$str = '{"id":23,"name":"test"}';
var_dump(is_json($str));中文英文截取
/**
* 移除字符串的BOM
*
* @param string $str 输入字符串
* @return string 输出字符串
*/
function removeBOM($str)
{
$str_3 = substr($str, 0, 3);
if ($str_3 == pack('CCC',0xef,0xbb,0xbf)) //utf-8
return substr($str, 3);
return $str;
}
/**
* 按UTF-8分隔为数组，效率比MB_Substr高
* 0xxxxxxx
* 110xxxxx 10xxxxxx
* 1110xxxx 10xxxxxx 10xxxxxx
* 11110xxx 10xxxxxx 10xxxxxx 10xxxxxx
* 111110xx 10xxxxxx 10xxxxxx 10xxxxxx 10xxxxxx
* 1111110x 10xxxxxx 10xxxxxx 10xxxxxx 10xxxxxx 10xxxxxx
*
* @param string $str 输入utf-8字符串
* @return array 返回成一段数组
*/
function str_split_utf8($str)
{
return preg_match_all('/./u', removeBOM($str), $out) ? $out[0] : FALSE;
}
/**
* 按非ascii字符占有几个字宽的方式切分字符串，并且不会将汉字切成半个
* 所谓字宽是指,使用默认字体显示时，非ascii字符相比英文字符所占大小，比如：宋体、微软雅黑中，汉字占两个宽度
* @example $ansi_width = 2 表示汉字等非英文字符按照两个字宽长度
* @example $ansi_width = 1 表示所有字符按一个字宽长度
*
* @param string $string 原始字符
* @param integer $offset 开始偏移,使用方法和substr一样,可以为负数
* @param integer $length 长度,使用方法和substr一样,可以为负数
* @param integer $ansi_width 汉字等非英文字符按照几个字符来处理
* @return string 返回裁减的字符串
*/
function substr_ansi($string, $offset, $length = 0, $ansi_width = 1)
{
if (empty($string)) return $string;;
$data = str_split_utf8($string);
if (empty($data)) return $string;
$as = $_as = array();
$_start = $_end = 0;
foreach($data as $k => $v)
$as[$k] = strlen($v) > 1 ? $ansi_width : 1;
$_as_rev = array_reverse($as,true);
$_as = $offset < 0 ? $_as_rev : $as;
$n = 0; $_offset = abs($offset);
foreach($_as as $k => $v) {
if ($n >= $_offset) {
$_start = $k;
break;
}
$n += $v;
}
//echo $_start,',';
$_as = $length <= 0 ? $_as_rev : $as;
end($_as); list($_end) = each($_as); reset($_as);//给$_end 设定默认值，一直到结尾
$n = 0; $_length = abs($length);
foreach($_as as $k => $v) {
if ($k >= $_start) {
if ($n >= $_length) {
$_end = $k + ($length <= 0 ? 1 : 0);
break;
}
$n += $v;
}
}
//echo $_end,'|||||';
if ($_end <= $_start)
return '';
$_data = array_slice($data, $_start, $_end - $_start);
return implode('',$_data);
}
/**
* 按非ascii字符占有几个字宽的方式计算字符串长度
* @example $ansi_width = 2 表示汉字等非英文字符按照两个字宽长度
* @example $ansi_width = 1 表示所有字符按一个字节长度
*
* @param string $string 原始字符
* @param integer $ansi_width 汉字等非英文字符按照几个字宽来处理
* @return string 返回字符串长度
*/
function strlen_ansi($string, $ansi_width = 1)
{
if (empty($string)) return 0;
$data = str_split_utf8($string);
if (empty($data)) return 0;
$as = 0;
foreach($data as $k => $v)
$as += strlen($v) > 1 ? $ansi_width : 1;
unset($data);
return $as;
}
/**
* smarty truncate 代码算法来自于Smarty
* @param string
* @param integer
* @param string
* @param boolean
* @param boolean
* @return string
*/
function truncate($string, $length = 80, $etc = '...', $break_words = false, $middle = false)
{
if ($length == 0)
return '';
$ansi_as = 2;
if (strlen_ansi($string, $ansi_as) > $length) {
$length -= min($length, strlen_ansi($etc, $ansi_as));
if (!$break_words && !$middle) {
$string = preg_replace('/\s+?(\S+)?$/u', '', substr_ansi($string, 0, $length+1, $ansi_as));
}
if(!$middle) {
return substr_ansi($string, 0, $length, $ansi_as) . $etc;
} else {
return substr_ansi($string, 0, $length/2, $ansi_as) . $etc . substr_ansi($string, -$length/2, 0, $ansi_as);
}
} else {
return $string;
}
}
// substr_ansi ($offset, $length, $ansi_width)
// 如果ansi_width = 2，则表示将汉字当做2个宽度处理
// offset length 在实际截取过程中，以英文的长度为准即可
echo substr_ansi('汉字我爱你', 0, 5, 2); //输出：汉字我
echo substr_ansi('汉字abc我爱你', 0, 5, 2); //输出：汉字a
echo substr_ansi('abcdef', 0, 5, 2); //输出：abcde
echo mb_substr('汉字我爱你', 0, 5); //输出：汉字我爱你
echo mb_substr('汉字abc我爱你', 0, 5); //输出：汉字abc
echo mb_substr('abcdef', 0, 5); //输出：abcde命令行获取ip地址
curl http://ip.3322.net/
curl -4 -s icanhazip.com
curl myip.ipip.net
curl ip.cn
curl httpbin.org/ip
curl https://www.v2ex.com/ip | grep "ip="
curl ifconfig.io
curl ifconfig.me
curl http://ip.taobao.com/service/getIpInfo2.php?ip=myip
颜值计算类
/**
* 排名算法
*/
class Rank
{
private static $K = 32;
private static $db; //数据库连接对象
function __construct()
{
require_once 'DBMysql.php';
self::$db = DBMysql::connect();
}
//根据id值查询颜值
public function queryScore($id)
{
$sql = "SELECT * FROM stu WHERE `id` = $id";
$info = mysqli_fetch_assoc(self::$db->query($sql));
return $info['score'];
}
//更新颜值
public function updateScore($Ra,$id)
{
self::$db->query("UPDATE `stu` SET `score` = $Ra WHERE `id` = $id");
}
//计算二者的胜率期望值
public function expect($Ra,$Rb)
{
$Ea = 1/(1+pow(10,($Rb-$Rb)/400));
return $Ea;
}
//计算最后得分
public function calculateScore($Ra,$Ea,$num)
{
$Ra = $Ra + self::$K*($num-$Ea);
return $Ra;
}
//获取本次参与评选的两位美女id，以及获胜方id：0,1
public function selectStu()
{
$id1 = $_POST['stu1'];
$id2 = $_POST['stu2'];
$victoryid = $_POST['vid'];
return $this->getScore($id1,$id2,$victoryid);
}
//计算得分
public function getScore($id1,$id2,$victoryid)
{
$Ra = $this->queryScore($id1);
$Rb = $this->queryScore($id2);
if ($Ra & $Rb) {
$Ea = $this->expect($Ra, $Rb);
$Eb = $this->expect($Rb, $Ra);
$Ra = $this->calculateScore($Ra, $Ea, 1-$victoryid);
$Rb = $this->calculateScore($Rb, $Eb, $victoryid);
$Rab = array($Ra,$Rb);
$this->updateScore($Ra, $id1);
$this->updateScore($Rb, $id2);
return $Rab;
} else {
return false;
}
}
}
$Rank = new Rank();
$Rank->selectStu();
第二个数组按第一个数组的键值排序
$a = [
'id',
'name',
'identityId',
'phone',
'email',
'schoolId'
];
$b = [
'id' => '唯一标识',
'identityId' => '身份证',
'phone' => '手机号',
'email' => '邮箱',
'name' => '姓名',
'schoolId' => '学校'
];
var_dump(array_merge(array_flip($a), $b));
$arr1 = array(
'id',
'name',
'identityId',
'phone',
'email',
'schoolId'
);
$arr2 = array(
'id' => '唯一标识',
'identityId' => '身份证',
'phone' => '手机号',
'email' => '邮箱',
'name' => '姓名',
'schoolId' => '学校',
);
array_multisort($arr1,SORT_DESC,$arr2);
print_r($arr2);
// 结果为：
Array
(
[schoolId] => 学校
[email] => 邮箱
[identityId] => 身份证
[phone] => 手机号
[id] => 唯一标识
[name] => 姓名
)
$c = array();
foreach ($a as $value) $c[$value] = $b[$value];
print_r($c);正则
[] 的意思匹配指定字符，而不是字符串
(string1|string2) 才是匹配多个字符串
(?! string1) 匹配 非 字符串
$text = "<form name='loginpageform' method='post' action='www.baidu.com'>";
$pattern="/<.*?[input|textarea|select].*?>/i";///<.*?(input|textarea|select).*?>/is
preg_match($pattern1,$text,$matches);
var_dump($matches);
//正则
$p = '#<p(?<p>.*?)>(?<text1>.*?)(?<img>\<img.*?>)(?<text2>.*?)</p>#is';
//替换
$r = '<p$1>$2$4</p><figure>$3</figure>';
//原内容
$s = '<p class="asas">fsdfsdfsf<img src="" >kolja;<span>a</span>d;lasd</p>';
echo preg_replace($p, $r, $s);
// 结果：
// <p class="asas">fsdfsdfsfkolja;<span>a</span>d;lasd</p><figure><img src="" ></figure>
$s = '<p class="asas">fsdfsdfsf<img src="1" />kolja;<span>a<img src="2" ></span>d;lasd</p>asdaa<p><img src="3"></p>';
echo preg_replace_callback('#<p(?<p>.*?)>(?<text>.*?)</p>#is', function($matches) {
preg_match_all('#<img.*?>#is', $str = $matches[0], $matches1, PREG_OFFSET_CAPTURE );
foreach (array_reverse($matches1[0]) as $v)
$str = substr_replace($str, '', $v[1], strlen($v[0]));
return $str.'<figure>'.implode('',array_map(function($v){return $v[0];}, $matches1[0])).'</figure>';
}, $s);//https://segmentfault.com/q/1010000007018039never use ‘+1 month’ and ‘-1 month’ in strtotime
>>> date('Y-m-28', strtotime("2016-12-31 -1 month"))
=> "2016-12-28"
>>> date('Y-m-28', strtotime("2016-01-31 +1 month"))
=> "2016-03-28"
>>> date('Y-m-d', strtotime("2016-01-31 first day of +1 month"))
=> "2016-02-01"
$d = new DateTime('2015-01-31');
$d->modify('first day of next month');
echo $d->format('Y-m-28');
$d = new DateTime('2015-01-31');
$d->modify('first day of next month');
echo $d->format('Y-m-28');
MySQL: DATE_ADD('2011-01-31', INTERVAL 1 MONTH) returns 2011-02-28
浮点数
>>> (1400.20-1400)*100
=> 20.000000000005
>>> bcmul((1400.26-1400),100)
=> "25"
>>> 1400.26-1400
=> 0.25999999999999
>>> bcsub(1400.26,1400,2)
=> "0.26"
>>> $b=79.99
=> 79.99
>>> floor($b*100)
=> 7998.0
>>> floor(bcmul($b,100))
=> 7999.0
>>> floor(round($b*100))
=> 7999.0php里简单的对称加密算法
$content = "大家好，我是中国人，你是谁";
/**
* 简单对称加密算法之加密
* @param String $string 需要加密的字串
* @param String $skey 加密EKY
* @return String
*/
function encode($string = '', $skey = 'wenzi') {
$strArr = str_split(base64_encode($string));
$strCount = count($strArr);
foreach (str_split($skey) as $key => $value)
$key < $strCount && $strArr[$key].=$value;
return str_replace(array('=', '+', '/'), array('O0O0O', 'o000o', 'oo00o'), join('', $strArr));
}
/**
* 简单对称加密算法之解密
* @param String $string 需要解密的字串
* @param String $skey 解密KEY
* @return String
*/
function decode($string = '', $skey = 'wenzi') {
$strArr = str_split(str_replace(array('O0O0O', 'o000o', 'oo00o'), array('=', '+', '/'), $string), 2);
$strCount = count($strArr);
foreach (str_split($skey) as $key => $value)
$key <= $strCount && $strArr[$key][1] === $value && $strArr[$key] = $strArr[$key][0];
return base64_decode(join('', $strArr));
}
echo '<pre>';
echo "string : " . $content . " <br />";
echo "encode : " . ($enstring = encode($content)) . '<br />';
echo "decode : " . decode($enstring);使用 MPDF 将HTML转为PDF
$html = "对盲人初学者来说，它无需任何额外的修改。";
// $html = "These are the most used acronyms throughout this manual.";
include './mpdf/mpdf.php';
$mpdf=new mPDF('utf-8'); //这里改成UTF-8 即可
$mpdf->autoScriptToLang = true;
$mpdf->autoLangToFont = true;
$mpdf->WriteHTML($html);
$mpdf->Output();strtr vs str_replace
$arr = array('中国', '中国人'); //关键字
foreach($arr as $v) { $new[$v] = '<b>'.$v.'</b>'; }
var_export($new); //输出: array( '中国' => '<b>中国</b>', '中国人' => '<b>中国人</b>' )
$str = '我是中国人我爱中国';
echo strtr($str, $new)."\n"; //输出: 我是<b>中国人</b>我爱<b>中国</b>
//对比:str_replace会发生重复替换,下面代码会输出: 我是<b><b>中国</b>人</b>我爱<b>中国</b>
echo str_replace(array('中国人','中国'), array('<b>中国人</b>','<b>中国</b>'), '我是中国人我爱中国');判断文件类型
$image=file_get_contents($url);
file_put_contents($imagePath, $image); //将图片流存入服务器图片目录
$type=image_type_to_extension(exif_imagetype($imagePath)); //文件类型
$image = file_get_contents($url);
echo check_image_type($image);
function check_image_type($image)
{
$bits = array(
'JPEG' => "\xFF\xD8\xFF",
'GIF' => "GIF",
'PNG' => "\x89\x50\x4e\x47\x0d\x0a\x1a\x0a",
'BMP' => 'BM',
);
foreach ($bits as $type => $bit) {
if (substr($image, 0, strlen($bit)) === $bit) {
return $type;
}
}
return 'UNKNOWN IMAGE TYPE';
}
$finfo = new finfo(FILEINFO_MIME_TYPE);
var_dump($finfo->file('t.jpg')); // ==> image/jpegphp Unicode正则
$str=json_decode('"ux这\u202eわかぃまぃだDD"');
var_dump($str);//string(28) "ux这わかぃまぃだDD"
var_dump(preg_match('/^[\w\x{4e00}-\x{9aff}]{4,12}$/u', $str,$match));//int(0)
var_dump($match);数组order by
$arr = array(
'中国' => array(
'金牌' => 8,
'银牌' => 3,
'铜牌' => 6,
),
'俄罗斯' => array(
'金牌' => 3,
'银牌' => 6,
'铜牌' => 3,
),
'美国' => array(
'金牌' => 6,
'银牌' => 8,
'铜牌' => 8,
),
'澳大利亚' => array(
'金牌' => 4,
'银牌' => 0,
'铜牌' => 4,
),
'意大利' => array(
'金牌' => 3,
'银牌' => 4,
'铜牌' => 2,
),
);
// 实现 ORDER BY
foreach($arr as $k => $v) {
$sort['金牌'][$k] = $v['金牌'];
$sort['银牌'][$k] = $v['银牌'];
$sort['铜牌'][$k] = $v['铜牌'];
}
array_multisort(
$sort['金牌'], SORT_DESC,
$sort['银牌'], SORT_DESC,
$sort['铜牌'], SORT_DESC,
$arr);
var_export($arr);
arr = [
{'name':'国家一','score':[10,7,5]},
{'name':'国家二','score':[10,9,5]},
{'name':'国家三','score':[11,7,5]},
{'name':'国家四','score':[10,7,9]},
]
print sorted(arr, key=lambda a: '%03d%03d%03d' % tuple(a['score']), reverse=True)base64图片处理
/**
* 保存64位编码图片
*/
function saveBase64Image($base64_image_content){
if (preg_match('/^(data:\s*image\/(\w+);base64,)/', $base64_image_content, $result)){
//图片后缀
$type = $result[2];
//保存位置--图片名
$image_name=date('His').str_pad(mt_rand(1, 99999), 5, '0', STR_PAD_LEFT).".".$type;
$image_url = '/uploads/image/'.date('Ymd').'/'.$image_name;
if(!is_dir(dirname('.'.$image_url))){
mkdir(dirname('.'.$image_url));
chmod(dirname('.'.$image_url), 0777);
umask($oldumask);
}
//解码
$decode=base64_decode(str_replace($result[1], '', $base64_image_content));
if (file_put_contents('.'.$image_url, $decode)){
$data['code']=0;
$data['imageName']=$image_name;
$data['url']=$image_url;
$data['msg']='保存成功！';
}else{
$data['code']=1;
$data['imgageName']='';
$data['url']='';
$data['msg']='图片保存失败！';
}
}else{
$data['code']=1;
$data['imgageName']='';
$data['url']='';
$data['msg']='base64图片格式有误！';
}
return $data;
}php strtotime 获取上周一的时间
>>> date('Y-m-d H:i:s',strtotime('-2 monday'))
=> "2016-10-03 00:00:00"
$days = date('w')==0?13:date('w')+6;
echo date('Y-m-d',time()-$days*86400);
date('Y-m-d', strtotime('-' . (6+date('w')) . ' days'));合并数组
$arr = array(
'0' => array(
'id' => 1,
'count' =>1,
),
'1' => array(
'id' => 2,
'count' =>1,
),
'2' => array(
'id' => 4,
'count' =>1,
),
'3' => array(
'id' => 2,
'count' =>1,
),
);
$new = $news = $newss = array();
foreach ($arr as $key => $value) {
if(!in_array($value['id'], $new)) {
$new[] = $value['id']; //$new保存不重复的id值
$news[$key] = $value; //$news保存不重复id的数组值
$newss[$value['id']] = $key; //$newss保存不重复的id的键值
}else {
$k = $newss[$value['id']]; //取出重复的id保存的第一个键值
$count = (int)$news[$k]['count']; //取出第一个相同id保存的count值
$news[$k]['count'] = $count+1; //赋值到新的数组
}
}
var_dump($news);https://github.com/iScript/YCms
https://phphub.org/topics/1759
http://blog.csdn.net/phpfengh…
https://phphub.org/topics/252…
http://www.xiabingbao.com/enc…
