urlencode

Function name: urlencode()

Applicable versions: All PHP versions

Usage: The urlencode() function is used to URL encode a string and convert special characters into % symbols followed by two-digit hexadecimal numbers. This allows you to pass data to the URL safely. Generally used to build URL parameters.

Syntax: string urlencode ( string $str )

parameter:

• $str: The string to be URL encoded.

Return value: Returns the URL encoded string.

Example:

 $str = "Hello, world!"; $encodedStr = urlencode($str); echo $encodedStr; // 输出：Hello%2C+world%21 $url = "https://www.example.com/search?q=" . urlencode("sunny day"); echo $url; // 输出：https://www.example.com/search?q=sunny+day

In the example, we first URL encode the string "Hello, world!" and get "Hello%2C+world%21". Note that the spaces are encoded as the "+" symbol.

Then, we use the urlencode() function to URL encode the search term "sunny day" and splice it into the URL, and we get the complete search URL " https://www.example.com/search?q=sunny+day".

By using the urlencode() function, we ensure that special characters in the URL are correctly encoded for easy passing to the server or access in the browser.