How to remove multiple identical characters in php

Removal method: 1. Use "str_split($str)" to convert the string into a character array, one character corresponds to an array element; 2. Use "array_unique($arr)" to remove the same characters in the character array Characters; 3. Use "implode("",$newArr)" to convert the deduplicated array into a string.

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

php remove multiple Same characters

In PHP, you can use the array_unique() function of the array to remove multiple identical characters from the string.

Implementation steps:

1. Use the str_split() function to convert the string into a character array. One character is an array element

<?php
header(&#39;content-type:text/html;charset=utf-8&#39;);   
$str = "1.2.3.1.2.3.4.5.6.7.8.9";
$arr=str_split($str);
var_dump($arr);

?>

You can see that there are many repeated character elements

2. Use the array_unique() function to deduplicate the array

$newArr=array_unique($arr);
var_dump($newArr);

ok, multiple identical characters have been removed

3. Use the implode() function to convert the deduplicated array into a string

The connector connecting each element of the array needs to be set to an empty character

$newStr=implode("",$newArr);
echo $newStr;

You’re done!

Recommended learning: "PHP Video Tutorial"

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