json_encode
Misc.
JSON Functions
PHP Manual

# json_last_error

(PHP 5 >= 5.3.0)

json_last_error — Returns the last error occurred

### Descripción

int json_last_error ( void )

Returns the last error (if any) occurred by last JSON parsing.

### Lista de parámetros

This function has no parameters.

### Valores retornados

Returns an integer, the value can be one of the following constants:

JSON error codes
Constant | Meaning
--- | ---
`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_SYNTAX` | Syntax error

### Ejemplos

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;
}
?>`

El resultado del ejemplo seria:

    Decoding: {"Organization": "PHP Documentation Team"} - No errors
    Decoding: {'Organization': 'PHP Documentation Team'} - Syntax error, malformed JSON

### Ver también

- json_decode() - Decodes a JSON string

json_encode
Misc.
JSON Functions
PHP Manual