How to convert array to json format in php-PHP Problem-php.cn

In PHP, you can use the json_encode() function to convert an array into json format data. The syntax is "json_encode (array variable)". The json_encode() function can JSON encode variables, returning JSON data if successful, and FALSE if failed.

How to convert array to json format in php

The operating environment of this tutorial: windows7 system, PHP7.1 version, DELL G3 computer

json_encode() can be used in PHP Function to convert array to json format data.

 1, 'b' => 2, 'c' => 3, 'd' => 4, 'e' => 5); echo json_encode($arr); ?>

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The execution result of the above code is:

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

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JSON function

##json_encode JSON encode the variable json_decode Decode the JSON format string and convert it into a PHP variable json_last_error Return the last error that occurred

Function	Description

json_encode

PHP json_encode() is used to JSON encode variables. This function returns JSON data if executed successfully, otherwise it returns FALSE.

Syntax

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

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Parameters

value: The value to encode. This function is only valid for UTF-8 encoded data.
options: Binary mask composed of the following constants: JSON_HEX_QUOT, JSON_HEX_TAG, JSON_HEX_AMP, JSON_HEX_APOS, JSON_NUMERIC_CHECK, JSON_PRETTY_PRINT, JSON_UNESCAPED_SLASHES, JSON_FORCE_OBJECT

The following example demonstrates Learn how to convert PHP objects into JSON format data:

name = "sachin"; $e->hobbies = "sports"; $e->birthdate = date('m/d/Y h:i:s a', "8/5/1974 12:20:03 p"); $e->birthdate = date('m/d/Y h:i:s a', strtotime("8/5/1974 12:20:03")); echo json_encode($e); ?>

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The above code execution result is:

{"name":"sachin","hobbies":"sports","birthdate":"08\/05\/1974 12:20:03 pm"}

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json_decode

PHP json_decode() function is used to decode JSON format strings and convert them into PHP variables.

Syntax

mixed json_decode ($json_string [,$assoc = false [, $depth = 512 [, $options = 0 ]]])

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Parameters

json_string: To be decoded JSON string, must be UTF-8 encoded data
assoc: When this parameter is TRUE, an array will be returned, and when FALSE, an object will be returned.
depth: A parameter of type integer that specifies the recursion depth
options: Binary Mask, currently only JSON_BIGINT_AS_STRING is supported.

Example

The following example demonstrates how to decode JSON data:

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The execution result of the above code is:

object(stdClass)#1 (5) { ["a"] => int(1) ["b"] => int(2) ["c"] => int(3) ["d"] => int(4) ["e"] => int(5) } array(5) { ["a"] => int(1) ["b"] => int(2) ["c"] => int(3) ["d"] => int(4) ["e"] => int(5) }

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