How to remove multiple identical characters from php

This article mainly introduces php how to remove multiple of the same characters of the relevant knowledge, the content is detailed and easy to understand, the operation is simple and fast, has a certain reference value, I believe that after reading this php how to remove multiple of the same characters of the article will have a harvest, let's take a look.

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

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

Php removes multiple identical characters

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

Implementation steps:

1. Use the str_split () function to convert a string into an array of characters, and a character is an array element.

You can see that there are many repetitive character elements.

2. Use the array_unique () function to remove duplicates from the array.

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

Ok, many of the same characters are removed

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

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

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

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