Today I submitted a JSON data to PHP using POST method (pay attention to GET method too), for example:
{"a":1,"b":2}
Retrieve this data in PHP: $s=$ _POST['data'] ;//or $_GET['data'], then this string is escaped after being taken out: {"a":1,"b":2}
If called directly:
$obj = json_decode($s);
print_r($obj);
echo $obj->a;
is wrong and an error will be reported. If $s is directly defined: $s='{"a ":1,"b":2}'; then there is no problem. Therefore, when processing JSON in PHP, you need to perform some escaping processing: $s=strips tutorial lashes($_POST['data']); Then proceed to json Just decode it.
json_decode — Encode JSON formatted strings
json_encode — JSON encode variables
Report a bug parametervalue The value to be encoded can be any data type except resource type. This function can only accept UTF-8 encoded data (Translation: refers to character/string type data) Report a bug Return value If the encoding is successful, a string represented in JSON form will be returned. Report a bug Example Example #1 A json_encode() example, the code is as follows: $arr = array ('a'=>1,'b'=>2, 'c'=>3,'d'=>4,'e'=>5); echo json_encode($arr); ?> //The above routine will output : {"a":1,"b":2,"c":3,"d":4,"e":5} json_encode — JSON encoding of variables json_decode — JSON format The string is encodedReport a bug Descriptionmixed json_decode ( string $json [, bool $assoc ] )Accepts a JSON format string and converts it into a PHP variableReport a bug Parameters json A string in json string format to be decoded. assoc When this parameter is TRUE, array will be returned instead of object. Report a bug Returns an object or if the optional assoc parameter is TRUE, an associative array is instead returned.Report a bug ExampleExample #1 Example of json_decode() $json = '{"a":1,"b":2,"c":3,"d":4,"e":5}'; var_dump(json_decode($json) ; a"] => int(1) ["b"] => int(2) ["c"] => int(3) ["d"] => int( 4) ["e"] => int(5) } array(5) { ["a"] => int(1) ["b"] = > int(2) ["c"] => int(3) ["d"] => int(4) ["e"] => int(5) } */
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