(PHP 5 >= 5.3.0, PHP 7)
json_last_error — 锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷拇锟斤拷锟�
锟斤拷锟斤拷校锟斤拷锟斤拷锟� JSON 锟斤拷锟斤拷锟斤拷锟绞憋拷锟斤拷锟斤拷锟侥达拷锟斤拷
锟剿猴拷锟斤拷没锟叫诧拷锟斤拷锟斤拷
锟斤拷锟斤拷一锟斤拷锟斤拷锟酵ｏ拷integer锟斤拷锟斤拷锟斤拷锟街碉拷锟斤拷锟斤拷锟斤拷碌某锟斤拷锟街伙拷锟�
| 锟斤拷锟斤拷 | 锟斤拷锟斤拷 | 锟斤拷锟斤拷锟斤拷 |
|---|---|---|
JSON_ERROR_NONE |
没锟叫达拷锟斤拷锟斤拷 | |
JSON_ERROR_DEPTH |
锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷栈锟斤拷锟� | |
JSON_ERROR_STATE_MISMATCH |
锟斤拷效锟斤拷锟届常锟斤拷 JSON | |
JSON_ERROR_CTRL_CHAR |
锟斤拷锟斤拷锟街凤拷锟斤拷锟襟，匡拷锟斤拷锟角憋拷锟诫不锟斤拷 | |
JSON_ERROR_SYNTAX |
锟斤法锟斤拷锟斤拷 | |
JSON_ERROR_UTF8 |
锟届常锟斤拷 UTF-8 锟街凤拷锟斤拷也锟斤拷锟斤拷锟斤拷为锟斤拷锟斤拷确锟侥憋拷锟诫。 | 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 |
指锟斤拷锟斤拷锟斤拷锟酵ｏ拷值锟睫凤拷锟斤拷锟诫。 | PHP 5.5.0 |
JSON_ERROR_INVALID_PROPERTY_NAME |
指锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟睫凤拷锟斤拷锟诫。 | PHP 7.0.0 |
JSON_ERROR_UTF16 |
锟斤拷锟轿碉拷 UTF-16 锟街凤拷锟斤拷锟斤拷锟斤拷锟斤拷为锟街凤拷锟斤拷锟诫不锟斤拷确锟斤拷 | PHP 7.0.0 |
Example #1 json_last_error() 锟斤拷锟斤拷
<?php
// 一锟斤拷锟斤拷效锟斤拷 json 锟街凤拷锟斤拷
$json[] = '{"Organization": "PHP Documentation Team"}';
// 一锟斤拷锟斤拷效锟斤拷 json 锟街凤拷锟斤拷锟结导锟斤拷一锟斤拷锟斤法锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟绞癸拷锟� ' 锟斤拷锟斤拷锟斤拷 " 锟斤拷为锟斤拷锟斤拷
$json[] = "{'Organization': 'PHP Documentation Team'}";
foreach ($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;
}
?>
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Decoding: {"Organization": "PHP Documentation Team"} - No errors
Decoding: {'Organization': 'PHP Documentation Team'} - Syntax error, malformed JSON
Example #2 json_encode() 锟斤拷 json_last_error()
<?php
// 锟斤拷效锟斤拷 UTF8 锟斤拷锟斤拷
$text = "\xB1\x31";
$json = json_encode($text);
$error = json_last_error();
var_dump($json, $error === JSON_ERROR_UTF8);
?>
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string(4) "null" bool(true)