How to convert array to json in php

How to convert array to json in php: use json_encode function, such as [json_encode($array_1)]. This function is used to JSON encode variables and, if executed successfully, returns JSON data.

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

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Syntax:

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

Parameters:

value: the value to be encoded . 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

Example:

$array_1 = array(); //一维数组
	$array_2 = array(); //多维数组
	$array_1['username']='ericwolf';
	$array_1['age']=25;
 
	$array_2['menber']['aa']['username']='ericwolf';
	$array_2['menber']['aa']['age']=25;
	$array_2['menber']['bb']['username']='eeee';
	$array_2['menber']['bb']['age']=22;
 
	print_r($array_2);
	$jsonObj_1 = json_encode($array_1);
	$jsonObj_1 = json_encode($array_2);

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