How to remove duplicate values ​​from a field value in PHP

Method: 1. Use the explode() function to split the specified field into an array; 2. Use the "array_unique" function to remove duplicate values ​​in the array; 3. Use the implode() function to remove duplicate values ​​from the array. Just combine it into a string.

The operating environment of this tutorial: windows10 system, PHP7.1 version, DELL G3 computer

php a field value How to remove duplicate values

explode(',',$data) splits the string into an array

array_unique() removes duplicate values ​​from the array

implode(',',$data))) Use, to split and combine the array into a string

The example is as follows:

$data = "xiaomi,xiaohong,xiaogang,xiaomi,xiaohu";
$data = implode(',',array_unique(explode(',',$data))); 
echo $data;

//The result is $data="xiaomi, xiaohong,xiaogang,xiaohu";

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