How to delete a certain character in a string in php

Method to delete characters: 1. Use str_replace() function, syntax "str_replace(specified character,'', $str)"; 2. Use substr_replace() function, syntax "substr_replace($str,' ',Specify the position of the character,1)".

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

php delete string Method for a certain character in

Method 1: Delete the specified character

In PHP, str_ireplace() and str_replace use a new string Replace the specific string (character) specified in the original string; when the replacement value is set to the empty character '', the specific character is deleted.

Note: str_replace is case-sensitive, str_ireplace() is not case-sensitive.

Example 1: Use str_replace() function

<?php
$str = &#39;abcdefgAC&#39;;
$replace = &#39;&#39;;
$search1 = &#39;a&#39;;
$search2 = &#39;A&#39;;
echo str_replace($search1, $replace, $str)."<br>";
echo str_replace($search2, $replace, $str)."<br>";
?>

Output result:

bcdefgAC
abcdefgC

Example 2: Use str_ireplace() function

<?php
$str = &#39;abcdefgAC&#39;;
$replace = &#39;&#39;;
$search1 = &#39;a&#39;;
$search2 = &#39;A&#39;;
echo str_ireplace($search1, $replace, $str)."<br>";
echo str_ireplace($search2, $replace, $str)."<br>";
?>

Output Result:

bcdefgC
bcdefgC

Method 2: Delete the characters at the specified position

substr_replace() function replaces part of the string with another string.

The syntax of the substr_replace() function is as follows:

mixed substr_replace ( mixed $string , mixed $replacement , mixed $start [, mixed $length ] )

substr_replace() Replaces the substring qualified by the start and optional length parameters in a copy of the string string using replacement. If the replacement value is the null character '', characters of length length can be deleted.

Example:

<?php
$str = &#39;abcdefgAC&#39;;
$replace = &#39;&#39;;
echo substr_replace($str, $replace, 0,1)."<br>";
echo substr_replace($str, $replace, 1,1)."<br>";
echo substr_replace($str, $replace, 2,1)."<br>";
echo substr_replace($str, $replace, 3,1)."<br>";
echo substr_replace($str, $replace, 4,1)."<br>";
echo substr_replace($str, $replace, 5,1)."<br>";
?>

Output result:

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