How to remove '-' character from php string

3 methods: 1. Use "str_replace("-",'',$str)" to replace the "-" character with a null character; 2. Use "preg_replace("/-/"," ",$str)" executes a regular expression to find the "-" character and remove it; 3. Use preg_filter() to remove it.

The operating environment of this tutorial: windows7 system, PHP8.1 version, DELL G3 computer

Remove the php string "-" character method

Method 1: Use str_replace() or str_replace() function

str_ireplace() and str_replace use new A string replaces a specific string specified in the original string. str_replace is case-sensitive, while str_ireplace() is not case-sensitive. The syntax of the two is similar.

Just replace the "-" characters with the empty characters ''.

<?php 
header(&#39;content-type:text/html;charset=utf-8&#39;);   
$str="1-2-3-4-5-6-7-8";
echo "原字符串：".$str."<br><br>";
echo "去掉&#39;-&#39;字符后：<br>";
echo str_replace("-",&#39;&#39;,$str)."<br>";
echo str_ireplace("-",&#39;&#39;,$str)."<br>";
?>

Method 2: Use the preg_replace() function

The preg_replace() function can be used with regular expressions to find all "- ” character and replace it with the empty character ''.

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

Method 3: Use the preg_filter() function

Similarly, the preg_filter() function works with regular expressions to find all " -" character and replace it with the empty character ''.

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

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