json_last_error
(PHP 5 >= 5.3.0)
json_last_error — Returns the last error occurred
Description
int json_last_error
( void
)
Returns the last error (if any) occurred by last JSON parsing.
Parameters
This function has no parameters.
Return Values
Returns an integer, the value can be one of the following constants:
| Constant | Meaning | Availability |
|---|---|---|
| JSON_ERROR_NONE | No error has occurred | |
| JSON_ERROR_DEPTH | The maximum stack depth has been exceeded | |
| JSON_ERROR_CTRL_CHAR | Control character error, possibly incorrectly encoded | |
| JSON_ERROR_STATE_MISMATCH | Invalid or malformed JSON | |
| JSON_ERROR_SYNTAX | Syntax error | |
| JSON_ERROR_UTF8 | Malformed UTF-8 characters, possibly incorrectly encoded | PHP 5.3.3 |
Examples
Example #1 json_last_error() 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_DEPTH:
echo ' - Maximum stack depth exceeded';
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_NONE:
echo ' - No errors';
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