simdjson_is_valid
Check if a JSON string is valid
説明
bool simdjson_is_valid(string $json = false, int $depth = 512)
パラメータ
-
json
-
The json string being validated.
This function only works with UTF-8 encoded strings.
This function validates inputs which
json_decode can decode,
provided that they are less than 4 GiB long.
-
depth
-
Maximum nesting depth of the structure being validated.
The value must be greater than 0,
and less than or equal to 2147483647.
Callers should use reasonably small values,
because larger depths require more buffer space and will
increase the recursion depth, unlike the current json_decode implementation.
戻り値
Returns true if json is a valid JSON
string, false otherwise.
エラー / 例外
If json is longer than 4 GiB, a SimdJsonException is thrown as of PECL simdjson 2.1.0,
while previously, a RuntimeException was thrown.
If depth is outside the allowed range,
a SimdJsonValueError is thrown as of PECL simdjson 3.0.0,
while previously, an error of level E_WARNING was raised.
例
例1 simdjson_decode examples
<?php
$json = '{"a":1,"b":2,"c":3}';
$invalidJson = '{"a":1,"b":2,"c":';
var_dump(simdjson_is_valid($json));
var_dump(simdjson_is_valid($invalidJson));
?>
例2 depth errors
<?php
// Encode some data with a maximum depth of 4
// (array -> array -> array -> string)
$json = json_encode(
[
1 => [
'English' => [
'One',
'January'
],
'French' => [
'Une',
'Janvier'
]
]
]
);
// Show the errors for different depths.
var_dump(simdjson_is_valid($json, 4));
var_dump(simdjson_is_valid($json, 3));
?>
注意
注意:
The JSON spec is not JavaScript, but a subset of JavaScript.
注意:
In the event of a failure to decode,
a SimdJsonException is thrown
and SimdJsonException::getCode and
SimdJsonException::getMessage can be used
to determine the exact nature of the error.