PHP recursively calls the array value and uses it to execute the specified function, recursive array

PHP recursively calls the array value and uses it to execute the specified function, recursive array_PHP tutorial

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Release： 2016-07-13 09:58:34

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How PHP recursively calls an array value and uses it to execute a specified function, Recursive Array

The example in this article describes how PHP recursively calls an array value and uses it to execute a specified function. Share it with everyone for your reference. The specific analysis is as follows:

The following is the original wordpress code. To be lazy, I simply modified it to apply other functions

/**
* Navigates through an array and removes slashes from the values.
*
* If an array is passed, the array_map() function causes a callback to pass the
* value back to the function. The slashes from this value will removed.
*
* @since 2.0.0
*
* @param mixed $value The value to be stripped.
* @return mixed Stripped value.
*/
function stripslashes_deep($value) {
 if ( is_array($value) ) {
  $value = array_map('stripslashes_deep', $value);
 } elseif ( is_object($value) ) {
  $vars = get_object_vars( $value );
  foreach ($vars as $key=>$data) {
   $value->{$key} = stripslashes_deep( $data );
  }
 } elseif ( is_string( $value ) ) {
  $value = stripslashes($value);
 }
 return $value;
}

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The code is as follows:

<&#63;php 
function function_deep($function,$value) {
  try {
    if(!function_exists($function)){
      $error = '"'.$function.'" is undefined';
      throw new Exception($error);
    }
  } catch (Exception $e) {
    echo 'Caught exception: ', $e->getMessage(), "\n";
    die();
  }
  if ( is_array($value) ) {
    $fun = Array();
    for($i=1;$i<=count($value);$i++){
      $fun[] = $function; 
    }
    $value = array_map("function_deep",$fun, $value);
  } elseif ( is_object($value) ) {
    $vars = get_object_vars( $value );
    foreach ($vars as $key=>$data) {
      $value->{$key} = function_deep($function,$data );
    }
  } elseif ( is_string( $value ) ) {
    $value = call_user_func($function,$value);
  }
  return $value;
}
$arr = array(
    "I'm bean",
    "I'm bean",
    array("I'm bean","I'm bean")
    );
var_dump(function_deep("addslashes",$arr));
// 输出结果
// array (size=3)
//  0 => string 'I\'m bean' (length=9)
//  1 => string 'I\'m bean' (length=9)
//  2 => 
//   array (size=2)
//    0 => string 'I\'m bean' (length=9)
//    1 => string 'I\'m bean' (length=9) 
&#63;>

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I hope this article will be helpful to everyone’s PHP programming design.