php-Arrays function-array_unique-remove duplicate values ​​in the array_PHP tutorial

array_unique() removes duplicate values ​​in the array

【Function】
This function will return a new array without duplicate values ​​based on the specified array, and the key names remain unchanged
This function first sorts the values ​​as strings, and then only retains the first encountered key name for each value,
           Then ignore all subsequent key names
This does not mean that the first occurrence of a key with the same value in an unsorted array is retained
【Scope of use】
​​​​​ php4>=4.0.1, php5.
【Use】
            mixed array_unique( array array )
           array/required/original array to be processed by the function
【Example】
[php]
$input=array('c'=>"green",'aed','b'=>'green','blue','bed');
var_dump(array_unique($input));
/*
array(4) {
["c"]=>
string(5) "green"
[0]=>
string(3) "aed"
[1]=>
string(4) "blue"
[2]=>
string(3) "bed"
}
*/

Excerpted from zuodefeng’s notes

http://www.bkjia.com/PHPjc/478192.htmlwww.bkjia.comtruehttp: //www.bkjia.com/PHPjc/478192.htmlTechArticlearray_unique() removes duplicate values ​​in the array [Function] This function will return no values ​​based on the specified array New array of repeated values, key names remain the same This function first takes the values ​​as strings...