How to use trim function in PHP

Usage of trim function in PHP: [trim()] function is a built-in function in PHP. It is used to remove spaces or predefined characters on the left and right sides of a string and return the modified string. Function The syntax is: [trim($string, $charlist)].

The trim() function is a built-in function in PHP that can be used to remove spaces and predefined characters on the left and right sides of a string. The following article will introduce you to the trim() function in PHP and introduce how to use the trim() function. I hope it will be helpful to you.

PHP trim function

trim() function removes whitespace characters or other predefined characters on both sides of a string.

Related functions:

● ltrim() function: removes blank characters or other predefined characters on the left side of the string.

● rtrim() function: Remove blank characters or other predefined characters on the right side of the string.

Basic syntax

trim($string, $charlist)

Parameters: trim() function accepts one required parameter and one optional parameter

$string: Used to specify a string from which whitespace and left and right predefined characters are to be removed; required parameter and cannot be omitted.

$charlist: used to specify the characters to be removed from the string. Optional parameter, which can be omitted; if omitted, all the following characters will be deleted:

●"\0" - NULL

●"\t ” - Tag

●“\n”-New line

●“\x0B”-Vertical tab character

　●　“\r” - Enter

●　“” - Ordinary white space

Return value: It returns a modified string by removing spaces as well as predefined characters on both sides of the left and right string.

Usage example of PHP trim function

Example 1:

<?php 
$str = "Hello World!"; 
echo trim($str, "Hell!"); 
?>

Output ：

o World

Example 2:

<?php 
header("content-type:text/html;charset=utf-8"); 
$str = "  欢迎来到php中文网！  "; 
echo trim($str); 
?>

Output:

欢迎来到php中文网！

Related video tutorial recommendation: "PHP Tutorial"

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