How to remove commas before and after in php

Methods to remove commas before and after: 1. Use trim() to remove commas on both sides of the string at once, using the syntax "trim($str,",")"; 2. Use ltrim() to remove the string For the comma at the beginning, use rtrim() to remove the comma at the end. The syntax is "ltrim(rtrim($str,","),",")".

The operating environment of this tutorial: Windows 7 system, PHP version 7.1, DELL G3 computer

php remove the commas before and after Two methods

• Use trim()

• Use ltrim() rtrim()

1. Use the trim() function

trim() function can remove commas on both sides of the string at one time

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

2. Use the ltrim() rtrim() function

• ltrim() function can remove commas at the beginning of the string

• rtrim() function can remove the comma at the end of the string

<?php
header(&#39;content-type:text/html;charset=utf-8&#39;);   
$str = &#39;,1,2,3,4,5,6,7,8,9,&#39;;
echo ltrim($str,",")."<br>";
echo rtrim($str,",")."<br>";
echo ltrim(rtrim($str,","),",");
?>

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