How to use urlencode() function for url encoding in PHP? (code example)

The urlencode() function is a built-in function in PHP used to encode urls. The following article will introduce to you some usage of the urlencode() function, so that you can understand how the urlencode() function encodes URLs. I hope it will be helpful to you.

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## The urlencode() function accepts a url as a parameter and returns a string. All non-alphanumeric characters contained in this string, except -_., are replaced with a percent sign (%) followed by two hexadecimal digits, and spaces are encoded as plus signs ( ).

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Basic syntax

string urldecode( $input )

Parameters :This function accepts a single parameter $input, which holds the url to be encoded.

Return value: The urlencode() function successfully returns the encoded string.

Let’s take a look at how the PHP urlencode() function encodes URLs through code examples.

Example 1:

<?php 
echo urlencode("PHP:s? hg+3\c=67 "); 
?>

Output:

PHP%3As%3F+hg%2B3%5Cc%3D67+

Example 2:

<?php 
echo urlencode("http://www.php.cn/") . "<br>"; 
echo urlencode("http://www.baidu.com/?tn=62095104_26_oem_dg") . "<br>"; 
?>

Output:

http%3A%2F%2Fwww.php.cn%2F
http%3A%2F%2Fwww.baidu.com%2F%3Ftn%3D62095104_26_oem_dg

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