How to convert multiple php arrays into one json data

Conversion method: 1. Use the "array_merge_recursive(array 1, array 2, array 3...)" statement to merge multiple arrays into one array; 2. Use json_encode() to convert the merged array For json data, the syntax is "json_encode (merged array)".

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

Convert multiple php Method of converting an array into a json data

1. Use the array_merge_recursive() function to merge multiple arrays into one array

array_merge_recursive(array1,array2,array3...)

Return value : Returns the merged array.

<?php
header("Content-type:text/html;charset=utf-8");
$arr1 = array (&#39;a&#39;=>1,&#39;b&#39;=>2,&#39;c&#39;=>3,&#39;d&#39;=>4,&#39;e&#39;=>5);
$arr2 = array (&#39;f&#39;=>6,&#39;g&#39;=>7,&#39;h&#39;=>8,&#39;i&#39;=>9,&#39;j&#39;=>10);
var_dump($arr1);
var_dump($arr2);
$arr = array_merge_recursive($arr1,$arr2);
var_dump($arr);
?>

2. Use json_encode() function to convert the merged array into json data

json_encode() function can The variable is JSON encoded and a JSON string is returned.

<?php
header("Content-type:text/html;charset=utf-8");
$arr1 = array (&#39;a&#39;=>1,&#39;b&#39;=>2,&#39;c&#39;=>3,&#39;d&#39;=>4,&#39;e&#39;=>5);
$arr2 = array (&#39;f&#39;=>6,&#39;g&#39;=>7,&#39;h&#39;=>8,&#39;i&#39;=>9,&#39;j&#39;=>10);
$arr = array_merge_recursive($arr1,$arr2);
var_dump($arr);
echo json_encode($arr);
?>

Description:

array_merge_recursive() The function is used to merge one or more arrays into one array.

• The difference between this function and the array_merge() function is that it handles the situation where two or more array elements have the same key name. array_merge_recursive() does not perform key name overwriting, but recursively combines multiple values ​​with the same key name into an array.

json_encode() function can JSON encode variables; if successful, a JSON-encoded string will be returned; if failed, false will be returned.

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