How to remove spaces at the beginning and end of a string in php

The way PHP removes spaces at the beginning and end of a string is to pass the string as a parameter to the trim() function, such as [$str = "Hello World! ";trim($str);].

The operating environment of this article: windows10 system, php 7.3, thinkpad t480 computer.

If we want to delete the spaces at the beginning and end of a string, it is actually very simple. Because PHP has provided us with the ready-made function trim(). Let's briefly introduce the trim() function

trim() function removes blank characters or other predefined characters on both sides of the string and returns the modified string.

For example:

Remove spaces on both sides of the string:

<?php
$str = " Hello World! ";
echo "不使用 trim: " . $str;
echo "<br>";
echo "使用 trim: " . trim($str);
?>

Output result:

不使用 trim: Hello World!
使用 trim: Hello World!

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