php – PDO Fetch数据返回字符串数组

2023年4月16日 296次阅读

我试图从PDO的
MySQL数据库中获取数据但不幸的是PDO将结果作为字符串数组返回.我想将原生MySQL数据类型保留在结果数组中.

我已经尝试将PDO :: ATTR_DEFAULT_FETCH_MODE设置为PDO :: FETCH_ASSOC和PDO :: FETCH_OBJ,但它仍然将INT数据作为字符串返回.

这是转储的结果：

array (size=1)
  0 => 
    object(stdClass)[27]
      public 'id' => string '3' (length=1)
      public 'avatar' => string '' (length=0)
      public 'fullName' => string 'Mikheil Janiashvili' (length=19)
      public 'email' => string 'xxxxx@yyyyy.com' (length=17)
      public 'phone' => string '23 3537 20 03544' (length=12)
      public 'educationGE' => string '' (length=0)
      public 'educationEN' => string '' (length=0)
      public 'educationRU' => string '' (length=0)
      public 'experienceGE' => string '' (length=0)
      public 'experienceEN' => string '' (length=0)
      public 'experienceRU' => string '' (length=0)
      public 'descriptionGE' => string '' (length=0)
      public 'descriptionEN' => string '' (length=0)
      public 'descriptionRU' => string '' (length=0)

最佳答案 当您实例化PDO对象时,您需要告诉它使用MySQL的本机准备查询：

$db->setAttribute(PDO::ATTR_EMULATE_PREPARES, false);

假设你正在使用PHP> = 5.3,你将使用mysqlnd库,它可以从准备好的查询中返回正确的数据类型.

例：

$php -a
Interactive shell

php > $db = PDO("mysql:host=localhost;dbname=test", "test", "");
php > $res = $db->query("SELECT 1, PI()");
php > var_dump($res->fetch());
array(4) {
  [1]=>
  string(1) "1"
  [2]=>
  string(1) "1"
  ["PI()"]=>
  string(8) "3.141593"
  [3]=>
  string(8) "3.141593"
}

php > $db = PDO("mysql:host=localhost;dbname=test", "test", "", [PDO::ATTR_EMULATE_PREPARES=>false]);
php > $res = $db->query("SELECT 1, PI()");
php > var_dump($res->fetch());
array(4) {
  [1]=>
  int(1)
  [2]=>
  int(1)
  ["PI()"]=>
  float(3.1415926535898)
  [3]=>
  float(3.1415926535898)
}
php >
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