How to remove single quotes from string in php

Two implementation methods: 1. Use str_replace() to replace all single quotes in the string with empty characters, the syntax is "str_replace("'","", string)"; 2. Use preg_replace() to execute the regular expression "/\'/" to search for all single quotes in the string and replace them with empty characters. The syntax is "preg_replace("/\'/","", characters string)".

The operating environment of this tutorial: windows7 system, PHP version 8.1, DELL G3 computer

In php, you can use the str_replace() function Or preg_replace() function to remove single quotes in the string, just replace the single quotes in the string with null characters.

Method 1: Use the str_replace() function to replace single quotes in the string with empty characters

str_replace() function replaces some characters in the string (size-sensitive Write).

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. A variable counting the number of substitutions.

# Just set the first parameter to a single quote "'" and the second parameter to a null character.

<?php
header(&#39;content-type:text/html;charset=utf-8&#39;);   
$str = "My name is &#39;LiHua&#39;，&#39;20&#39; years old！";
echo "原字符串：".$str."<br>";
$new = str_replace("&#39;","",$str);
echo "去除单引号后：".$new;
?>

Method 2: Use the preg_replace() function with the regular expression /\'/ to replace the single quotes in the string with Null character

preg_replace function performs a regular expression search and replace.

mixed preg_replace ( mixed $pattern , mixed $replacement , mixed $subject [, int $limit = -1 [, int &$count ]] )

Search for the part matching pattern in subject and replace it with replacement.

Parameter description:

• $pattern: The pattern to be searched, which can be a string or a string array.

• $replacement: String or array of strings used for replacement.

• $subject: The target string or string array to be searched and replaced.

• $limit: Optional, the maximum number of substitutions for each subject string per pattern. The default is -1 (no limit).

• $count: Optional, the number of times the replacement is performed.

Just use the preg_replace() function to execute the regular expression /\'/ to search for all single quotes in the string and replace them with empty Just use the characters

<?php
header(&#39;content-type:text/html;charset=utf-8&#39;);   
$str = "My name is &#39;LiHua&#39;，&#39;20&#39; years old！";
echo "原字符串：".$str."<br>";
$new = preg_replace("/\&#39;/","",$str);
echo "去除单引号后：".$new;
?>

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