php convert array to json format

php method to convert an array to json format: first create a PHP sample file; then pass "$arr = [10,'Tom',true, '2015-10-15'];echo json_encode( $arr);" statement can be converted.

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

How does php convert an array into json format? ?

PHP converts an array into a JSON string

<?php
/**PHP把数组转换为JSON字符串**/
$arr = [10,&#39;Tom&#39;,true, &#39;2015-10-15&#39;];
//echo $arr;
echo json_encode($arr);//编码为JSON字符串
$arr = [&#39;eid&#39;=>10,&#39;ename&#39;=>&#39;Tom&#39;,&#39;isMarried&#39;=>true, &#39;birthday&#39;=>&#39;2015-10-15&#39;];
//echo $arr;
echo json_encode($arr);//编码为JSON字符串
//结论：索引数组会被json_encode转换为JSON数组，关联数组会被json_encode转换为JSON对象
 ?>

The results are as follows

[10,"Tom",true,"2015-10-15"]
{"eid":10,"ename":"Tom","isMarried":true,"birthday":"2015-10-15"}

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