JSON_LAST_ERROR(3) 1 JSON_LAST_ERROR(3)
json_last_error - Returns the last error occurred
SYNOPSIS
int json_last_error (void )
DESCRIPTION
Returns the last error (if any) occurred during the last JSON encoding/decoding.
PARAMETERS
This function has no parameters.
RETURN VALUES
Returns an integer, the value can be one of the following constants:
JSON error codes
+----------------------------+---------------------------------------------------+
| Constant | |
| | |
| | Meaning |
| | |
| | Availability |
| | |
+----------------------------+---------------------------------------------------+
| | |
| JSON_ERROR_NONE | |
| | |
| | No error has occurred |
| | |
| | |
| | T{ |
| | |
| | JSON_ERROR_DEPTH |
| | |
| | The maximum stack depth has been exceeded |
| | |
| | |
| | T{ |
| | |
| | JSON_ERROR_STATE_MISMATCH |
| | |
| | Invalid or malformed JSON |
| | |
| | |
| | T{ |
| | |
| | JSON_ERROR_CTRL_CHAR |
| | |
| | Control character error, possibly incorrectly |
| | encoded |
| | |
| | |
| | T{ |
| | |
| | JSON_ERROR_SYNTAX |
| | |
| | Syntax error |
| | |
| | |
| | T{ |
| | |
| | JSON_ERROR_UTF8 |
| | |
| | Malformed UTF-8 characters, possibly incorrectly |
| | encoded |
| | |
| | PHP 5.3.3 |
| | |
| | |
| JSON_ERROR_RECURSION | |
| | |
| | One or more recursive references in the value to |
| | be encoded |
| | |
| | PHP 5.5.0 |
| | |
| | |
| JSON_ERROR_INF_OR_NAN | |
| | |
| | One or more NAN or INF values in the value to be |
| | encoded |
| | |
| | PHP 5.5.0 |
| | |
| | |
|JSON_ERROR_UNSUPPORTED_TYPE | |
| | |
| | A value of a type that cannot be encoded was |
| | given |
| | |
| | PHP 5.5.0 |
| | |
+----------------------------+---------------------------------------------------+
EXAMPLES
Example #1
json_last_error(3) example
<?php
// A valid json string
$json[] = '{"Organization": "PHP Documentation Team"}';
// An invalid json string which will cause an syntax
// error, in this case we used ' instead of " for quotation
$json[] = "{'Organization': 'PHP Documentation Team'}";
foreach ($json as $string) {
echo 'Decoding: ' . $string;
json_decode($string);
switch (json_last_error()) {
case JSON_ERROR_NONE:
echo ' - No errors';
break;
case JSON_ERROR_DEPTH:
echo ' - Maximum stack depth exceeded';
break;
case JSON_ERROR_STATE_MISMATCH:
echo ' - Underflow or the modes mismatch';
break;
case JSON_ERROR_CTRL_CHAR:
echo ' - Unexpected control character found';
break;
case JSON_ERROR_SYNTAX:
echo ' - Syntax error, malformed JSON';
break;
case JSON_ERROR_UTF8:
echo ' - Malformed UTF-8 characters, possibly incorrectly encoded';
break;
default:
echo ' - Unknown error';
break;
}
echo PHP_EOL;
}
?>
The above example will output:
Decoding: {"Organization": "PHP Documentation Team"} - No errors
Decoding: {'Organization': 'PHP Documentation Team'} - Syntax error, malformed JSON
Example #2
json_last_error(3) with json_encode(3)
<?php
// An invalid UTF8 sequence
$text = "xB1x31";
$json = json_encode($text);
$error = json_last_error();
var_dump($json, $error === JSON_ERROR_UTF8);
?>
The above example will output:
string(4) "null"
bool(true)
SEE ALSO
json_last_error_msg(3), json_decode(3), json_encode(3).
PHP Documentation Group JSON_LAST_ERROR(3)
