PHP detects whether it is json

PHP method to determine whether it is in json format

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

Judge that the data is not in JSON format:

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

Judge that the data is legal json data: (PHP version is greater than 5.3)

function is_json($string) { www.jb51.net
 json_decode($string);
 return (json_last_error() == JSON_ERROR_NONE);
}

json_last_error() function returns the error that occurred during the data encoding and decoding process

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;
}

If it is not json, return false.

Recommended tutorial: PHP video tutorial

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