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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)
