How to convert the key (key name) in the array to a string in php

Conversion method: 1. Use the array_keys() function to obtain all keys in the array, and return the obtained array key names in the form of an array; 2. Use the implode() function to convert the key array to String, syntax "implode(array_keys($arr))".

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

php Convert the keys (key names) in the array to strings

In PHP, if you want to convert all the key names in the array to strings, you need two steps:

• First use the array_keys() function to obtain all key names in the array, and return the obtained array key names in array form.

• Then use the implode() function to convert the key array into a string

Implementation code:

<?php
header("Content-type:text/html;charset=utf-8");
$arr=array("Name"=>"Peter","Age"=>"41","Country"=>"USA");
var_dump($arr);
$keys=array_keys($arr);
var_dump($keys);
$str=implode($keys);
var_dump($str);
?>

Recommended learning: "PHP Video Tutorial", "PHP ARRAY"

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