How to remove the last character from variables in php

Removal method: 1. Use the "substr(variable,0,-1)" statement to cut off the last character of the English string in reverse order; 2. Use "mb_substr(variable,0,-1, "Character encoding ")" statement can delete the last character of the Chinese string; 3. Use the "rtrim(variable, "specified character")" statement.

The operating environment of this tutorial: windows7 system, PHP7.1 version, DELL G3 computer

Remove the variables in php The last character

Method 1: Use the substr() function

Use the substr() function to cut off the last character in reverse order ( This function cannot be used with Chinese characters).

substr($arr_str, 0, -1)

Example:

<?php
$num = 12345;
$str = substr($num, 0, -1) ;
echo $num;
var_dump($str);

$str = "abcdef";
echo $str;
$str = substr($str, 0, -1);
var_dump($str);

?>

Method 2: Use mb_substr() function

mb_substr( ) function is used the same as the substr() function, just cut off the last character in reverse order; but this function can be used for Chinese characters.

<?php
header(&#39;content-type:text/html;charset=utf-8&#39;);   
$num = 12345;
$str = mb_substr($num, 0, -1) ;
echo $num;
var_dump($str);

$str = "php中文网啦啦";
echo $str;
$str = mb_substr($str, 0, -1,"utf-8");
var_dump($str);

?>

3. Use the rtrim() function

rtrim — delete the blank characters (or other characters) at the end of the string

rtrim($arr_str, "指定字符")

Example:

<?php
header(&#39;content-type:text/html;charset=utf-8&#39;);   
$num = "1,2,3,4,5,6,";
$str = rtrim($num, ",")  ;
echo $num;
var_dump($str);

$str = "php中文网啦啦";
echo $str;
$str = rtrim($str,"啦");
var_dump($str);

?>

Explanation: The rtrim() function will delete consecutive characters on the right.

Recommended learning: "PHP Video Tutorial"

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