How to remove characters at the end of string in php

php method to remove the characters at the end of the string: 1. Directly use the substr() function to trim the last character in reverse order, the syntax is "substr(string,0,-1)"; 2. Use rtrim() Function, syntax "rtrim(string,charlist)".

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

php removes strings The last character

Method 1: Use the substr() function

Use the substr() function directly to cut off the last character in reverse order

<?php
header(&#39;content-type:text/html;charset=utf-8&#39;);
$str = &#39;123,234,345,&#39;;
echo "原字符串：",$str,&#39;<br/>&#39;;
echo "去掉末尾字符的字符串：",substr($str,0,-1);
?>

Output:

原字符串：123,234,345,
去掉末尾字符的字符串：123,234,345

Description:

substr() function returns a part of a string. Syntax:

substr(string,start,length)

Method 2: Use the rtrim() function

rtrim() function removes the right side of the string whitespace characters or other predefined characters on the side.

1. Specify the last character

<?php
header(&#39;content-type:text/html;charset=utf-8&#39;);
$str = &#39;123,234,345,&#39;;
echo "原字符串：",$str,&#39;<br/>&#39;;
echo "去掉末尾字符的字符串：",rtrim($str,&#39;,&#39;);
?>

Output:

原字符串：123,234,345,
去掉末尾字符的字符串：123,234,345

2. Don’t know the last character

<?php
header(&#39;content-type:text/html;charset=utf-8&#39;);
$str = &#39;123,234,345,1&#39;;
echo "原字符串：",$str,&#39;<br/>&#39;;

//不知道末尾字符，需先获取末字符
$last_char=$str{strlen($str)-1}; 
echo "去掉末尾字符的字符串：",rtrim($str,$last_char);
?>

Output:

原字符串：123,234,345,1
去掉末尾字符的字符串：123,234,345,

Recommended learning: "PHP Video Tutorial"

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