How to delete an element from a string in php

php method to delete an element in a string: 1. Use str_replace(), syntax "str_replace("value to be deleted","",$str)"; 2. Use str_ireplace(), Syntax "str_ireplace("value to be deleted","",$str)".

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

Delete characters in php An element in the string

Method 1: Use the str_replace() function

The str_replace() function replaces elements in the string with other characters Some characters (case-sensitive); when the replacement value is the empty string "", the specified value can be deleted.

Syntax:

str_replace(find,replace,string,count)

Parameters	Description
find	Required. Specifies the value to look for.
replace	Required. Specifies a value that replaces the value in find.
string	Required. Specifies the string to be searched for.
count	Optional. Variable counting the number of substitutions.

Example:

<?php
header("Content-type:text/html;charset=utf-8");
$str = &#39;hello,world,Hello,world&#39;;
echo "原字符串：".$str."<br>";

$search = &#39;hello&#39;;
$replace = &#39;&#39;;

echo "需要删除的元素：".$search."<br>";
echo "删除指定值的字符串：".str_replace($search, $replace, $str);
?>

##Method 2: Use str_ireplace() function

str_ireplace() function replaces some characters in the string (not case-sensitive); similarly, when the replacement value is the empty string

"", the specified value can be deleted.

The str_ireplace() function has similar syntax to the str_replace() function, please refer to the above.

Example:

<?php
header("Content-type:text/html;charset=utf-8");
$str = &#39;hello,world,Hello,world&#39;;
echo "原字符串：".$str."<br>";

$search = &#39;hello&#39;;
$replace = &#39;&#39;;

echo "需要删除的元素：".$search."<br>";
echo "删除指定值的字符串：".str_ireplace($search, $replace, $str);
?>

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