Recommended 10 articles for PHP array_unique () functions

Our previous article described how to delete headers, tails, arbitrary elements in the PHP array, and this article tells us to delete the repeating elements in the array by using the Array_unique () function. The Array_unique () function, which sorts the values of an array element as a string and then retains only the first key name for each value, ignores all subsequent key names, or deletes the duplicate elements in the array, with the following syntax: Array arry_unique (array array) parameters Array is the input. The following example causes the Array_unique () function to delete the repeating element in the array, with the following example code: <?phpheader ("content-type:text/html; Charset=utf-8 "); $array _push = Array (" topic.alibabacloud.com "," www.php.cn ", &quo

1. How to delete duplicate elements in a PHP array

Summary: the Array_unique () function, which sorts the values of an array element as a string, and then retains only the first key name for each value, ignoring all subsequent key names, or deleting duplicate elements in the array.

2. PHP Array function sequence Array_unique ()-Removes duplicate element values from the array

Summary: the Array_unique () function shifts the duplicate values in the array and returns the result arrays. When the values of several array elements are equal, only the first element is preserved, and the other elements are deleted.

3. PHP array de-weight relatively fast implementation mode

Introduction: Using PHP's Array_unique () function allows you to pass an array, and then remove the duplicate values, return a unique value of the array, through this article to introduce the PHP array to the more rapid implementation of the method, the need for friends to refer to this article

4. PHP array_flip () Delete array repeating elements

Summary: In PHP, there is an available function for deleting duplicate elements in an array, which is array_unique (), but it is not the most efficient method, and using the Array_flip () function will be about five times times higher than Array_uniqure ().

5. PHP Array function sequence Array_unique ()-Removes duplicate element values from the array

Summary: the Array_unique () function shifts the duplicate values in the array and returns the result arrays. When the values of several array elements are equal, only the first element is preserved, and the other elements are deleted.

6. PHP removes duplicate elements from an array using the Array_flip () function

Summary: Abstract: In PHP, the deletion of duplicate elements in an array has an available function, that is array_unique (), but it is not the most efficient method, using the Array_flip () function will be more than Array_unique () at a speed of about five times times. ...

7. PHP array to prevent duplication, key value usage, splicing, split usage

Summary: foreach ($a as $key =&gt; $val) {//key is a value of $ A $ A for the number of $ A $val $val = Array_unique ($val);//This is the $insertDate to prevent duplication of array $val = arr AY (//Set new array ' ini_id ' =&gt; $key,//array subscript ' I ...

8. Profiling Array_keys and Array_unique from PHP source

Introduction:: This article mainly introduced from the PHP source analysis Array_keys and array_unique, for PHP tutorial interested students can refer to.

9. Analysis of source code of Array_keys and Array_unique functions in PHP

Introduction:: This article mainly introduces PHP Array_keys and array_unique function source code analysis, for PHP tutorial interested students can refer to.

PHP two array functions self-understanding PHP Declaration array php Create array php array sequence

Introduction: Array functions, php:php Two array functions self-understanding: PHP Array_unique () function to remove duplicates in the array: "Red", "b" = "green", "c" = "red");p Rint_r (Array_ Unique ($a));? The >array_unique () function shifts the duplicates in the array and returns the result arrays. When several array elements are equal, only the first element is preserved, and the other elements are deleted. The key name in the returned array is not changed. Note: The retained array will maintain the first

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