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Описание

string json_encode ( mixed $value [, int $options= 0 ] )

Returns a string containing the JSON representation of value .

Список параметров

value

The value being encoded. Can be any type except a resource.

This function only works with UTF-8 encoded data.

options

Bitmask consisting of JSON_HEX_QUOT, JSON_HEX_TAG, JSON_HEX_AMP, JSON_HEX_APOS, JSON_FORCE_OBJECT. Defaults to 0.

Возвращаемые значения

Returns a JSON encoded string on success.

Список изменений

Версия	Описание
5.2.1	Added support to JSON encode basic types.
5.3.0	The `options` parameter was added.

Примеры

Пример #1 A json_encode() example


<?php
$arr = array ('a'=>1,'b'=>2,'c'=>3,'d'=>4,'e'=>5);

echo json_encode($arr);
?>

Результат выполнения данного примера:

{"a":1,"b":2,"c":3,"d":4,"e":5}

Пример #2 A json_encode() example showing all the options in action


<?php
$a = array('<foo>',"'bar'",'"baz"','&blong&');

echo "Normal: ", json_encode($a), "\n";
echo "Tags: ",   json_encode($a,JSON_HEX_TAG), "\n";
echo "Apos: ",   json_encode($a,JSON_HEX_APOS), "\n";
echo "Quot: ",   json_encode($a,JSON_HEX_QUOT), "\n";
echo "Amp: ",    json_encode($a,JSON_HEX_AMP), "\n";
echo "All: ",    json_encode($a,JSON_HEX_TAG|JSON_HEX_APOS|JSON_HEX_QUOT|JSON_HEX_AMP), "\n\n";

$b = array();

echo "Empty array output as array: ", json_encode($b), "\n";
echo "Empty array output as object: ", json_encode($b, JSON_FORCE_OBJECT), "\n\n";

$c = array(array(1,2,3));

echo "Non-associative array output as array: ", json_encode($c), "\n";
echo "Non-associative array output as object: ", json_encode($c, JSON_FORCE_OBJECT), "\n\n";
?>

Результат выполнения данного примера:

Normal: ["<foo>","'bar'","\"baz\"","&blong&"]
Tags: ["\u003Cfoo\u003E","'bar'","\"baz\"","&blong&"]
Apos: ["<foo>","\u0027bar\u0027","\"baz\"","&blong&"]
Quot: ["<foo>","'bar'","\u0022baz\u0022","&blong&"]
Amp: ["<foo>","'bar'","\"baz\"","\u0026blong\u0026"]
All: ["\u003Cfoo\u003E","\u0027bar\u0027","\u0022baz\u0022","\u0026blong\u0026"]

Empty array output as array: []
Empty array output as object: {}

Non-associative array output as array: [[1,2,3]]
Non-associative array output as object: {"0":{"0":1,"1":2,"2":3}}

Смотрите также

json_decode() - Decodes a JSON string