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PHP中数组转换成json字符串程序代码

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Release: 2016-06-13 11:19:43
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数据转换js格式的数据是我们常用一种数据传递的方法,特别像ajax中会时常用到把数据转换成json然后再转换回来,下面看一个实例。  

 代码如下 复制代码

function array_to_json($array) {
 if (! is_array ( $array )) {
  return false;
 }
 
 $associative = count ( array_diff ( array_keys ( $array ), array_keys ( array_keys ( $array ) ) ) );
 if ($associative) {
 
  $construct = array ();
  foreach ( $array as $key => $value ) {
  
   // We first copy each key/value pair into a staging array,
   // formatting each key and value properly as we go.
  


   // Format the key:
   if (is_numeric ( $key )) {
    $key = "key_$key";
   }
   $key = """ . addslashes ( $key ) . """;
  
   // Format the value:
   if (is_array ( $value )) {
    $value = array_to_json ( $value );
   } else if (! is_numeric ( $value ) || is_string ( $value )) {
    $value = """ . addslashes ( $value ) . """;
   }
  
   // Add to staging array:
   $construct [] = "$key: $value";
  }
 
  // Then we collapse the staging array into the JSON form:
  $result = "{" . implode ( ",", $construct ) . "}";
 
 } else { // If the array is a vector (not associative):
 


  $construct = array ();
  foreach ( $array as $value ) {
  
   // Format the value:
   if (is_array ( $value )) {
    $value = array_to_json ( $value );
   } else if (! is_numeric ( $value ) || is_string ( $value )) {
    $value = """ . addslashes ( $value ) . """;
   }
  
   // Add to staging array:
   $construct [] = $value;
  }
 
  // Then we collapse the staging array into the JSON form:
  $result = "[" . implode ( ", ", $construct ) . "]";
 }
 
 return $result;
}

你可以试试这个 然后json_encode换成上面的函数看看正常了吗

 代码如下 复制代码

if($_GET['enews']=='ok'){
    echo json_encode(array('a'=>'王进'));exit;
}
?>
 

关于php中json_encode

json_encode()将PHP的不同类型的变量转换为对应的JSON字符串 string json_encode(mixed $value [, int

$options = 0])

PHP 5.3.0

JSON_HEX_QUOT: 将所有的双引号(”)转换为u0022。
// 实例代码:

 代码如下 复制代码
$data = '"';
echo json_encode($data); // """
echo json_encode($data, JSON_HEX_QUOT);

 // "u0022"■JSON_HEX_TAG: 将所有的大于号(>)转换为u003E,将

所有的小于号( JSON_HEX_AMP: 将所有的与号(&)转换为 u0026。
JSON_HEX_APOS: 将所有的单引号(’)转换为u0027。
JSON_FORCE_OBJECT: 当value为非关联数组时强制输出结果为JSON对象。在接收者要求数据为对象且value为空数组时

使用。

// 实例代码:

 代码如下 复制代码
$data = array();
echo json_encode($data); // []
echo json_encode($data, JSON_FORCE_OBJECT); // {}

PHP 5.3.3

JSON_NUMERIC_CHECK: Encodes numeric strings as numbers.

PHP 5.4.0

JSON_BIGINT_AS_STRING: Encodes large integers as their original string value. Available since PHP
5.4.0.

JSON_PRETTY_PRINT: Use whitespace in returned data to format it. Available since PHP 5.4.0.
JSON_UNESCAPED_SLASHES: Don’t escape /. Available since PHP 5.4.0.
JSON_UNESCAPED_UNICODE: Encode multibyte Unicode characters literally (default is to escape as uXXXX).

Available since PHP 5.4.0.


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