How to remove leading and trailing double quotes in php

Methods for head and tail double quotes: 1. Use the "trim($str,'"')" statement to remove; 2. Use "ltrim(rtrim($str,'"'),'"') " statement to remove; 3. Use the "substr(substr($str,1),0,strlen($str)-2)" statement to remove.

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

How to remove the first and last double quotes in php

1. Use the trim() function

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

<?php
header(&#39;content-type:text/html;charset=utf-8&#39;);   
$str = &#39;"hello" "hi"&#39;;
echo "原字符串：".$str."<br>";
echo "去双引号后：".trim($str,&#39;"&#39;);
?>

2. Use the ltrim() rtrim() function

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

• ## The #rtrim() function can remove the double quotes at the end of the string

<?php
header(&#39;content-type:text/html;charset=utf-8&#39;);   
$str = &#39;"hello" "hi"&#39;;
echo "原字符串：".$str."<br>";
echo "去双引号后：<br>";
echo ltrim($str,&#39;"&#39;)."<br>";
echo rtrim($str,&#39;"&#39;)."<br>";
echo ltrim(rtrim($str,&#39;"&#39;),&#39;"&#39;);
?>

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3. Use the strlen() function

<?php
header(&#39;content-type:text/html;charset=utf-8&#39;);   
$str = &#39;"hello" "hi"&#39;;
echo "原字符串：".$str."<br>";
echo "去双引号后：<br>";
echo substr($str,1)."<br>";
echo substr($str,0,strlen($str)-1)."<br>";
echo substr(substr($str,1),0,strlen($str)-2);
?>

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