What are the functions in php that can remove spaces?

The functions in php that can remove spaces are: 1. ltrim(), this function can remove spaces at the beginning of a string; 2. rtrim(), this function can remove spaces at the end of a string; 3. , trim(), this function can remove spaces at the beginning and end of a string.

#ltrim function removes spaces or other characters at the beginning of a string.

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Syntax:

string ltrim(string $str [,string $charlist])

Description: charlist specifies which characters to delete from the string. If this parameter is omitted by default, all the following characters

are removed. Example:

$str = "\n\n\t\tABC\t\t";
echo ltrim($str);
//输出后,ABC前面的空白就没有了

rtrim function removes spaces or other characters at the end of a string.

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Syntax:

string rtrim(string $str[,string $charlist])

trim function to delete spaces or other spaces at the beginning and end of a string character.

Grammar:

string trim(string $str[,string $charlist])

Example:

<?php
$str = &#39;Demon is an English teacher.17847564092&#39;;
$str = rtrim($str,&#39;0..9&#39;);
echo $str;
//删除末尾多余的数字

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