PHP determines whether it is a json array

First of all, remember that json_encode returns a string, and json_decode returns an object.

Determine if the data is not in JSON format :

function is_not_json($str){  
    return is_null(json_decode($str));
}

Determine whether the data is legal json data: (PHP version is greater than 5.3)

function is_json($string) { www.111cn.net
 json_decode($string);
 return (json_last_error() == JSON_ERROR_NONE);
}

json_last_error() function returns what happened during the data encoding and decoding process Error.

Note: The string operated by json encoding and decoding must be UTF8.

Example:

/**
* 解析json串
* @param type $json_str
* @return type
*/
function analyJson($json_str) {
$json_str = str_replace('＼＼', '', $json_str);
$out_arr = array();
preg_match('/{.*}/', $json_str, $out_arr);
if (!empty($out_arr)) {
$result = json_decode($out_arr[0], TRUE);
} else {
return FALSE;
}
return $result;
}

Recommended tutorial:PHP Video tutorial

The above is the detailed content of PHP determines whether it is a json array. For more information, please follow other related articles on the PHP Chinese website!