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Value method: 1. Use the "array_unique(array)" statement to remove duplicate values in the array and return an array containing different values; 2. Use the "array_keys(array_count_values(array))" statement to remove duplicates Duplicate values in an array, returns an array containing distinct values.
The operating environment of this tutorial: windows7 system, PHP7.1 version, DELL G3 computer
php takes from the array Different values
1. Use the array_unique() function:
array_unique() function is used to remove duplicates in the array value. If two or more array values are the same, only the first value is retained and the other values are removed.
<?php header("Content-type:text/html;charset=utf-8"); $arr=array("A","Cat","Dog","A","Dog",1,2,3,3,2,1); echo "原数组:"; var_dump($arr); echo "获取数组中的不同值:"; var_dump(array_unique($arr)); ?>
2. Use array_keys() and array_count_values() functions
array_count_values() function is used to count all values in the array The number of occurrences. The key name in the returned array is the value of the original array, and the key value is the number of times the value appears in the original array.
array_keys() function returns a new array containing all the key names in the array.
<?php header("Content-type:text/html;charset=utf-8"); $arr=array("A","Cat","Dog","A","Dog",1,2,3,3,2,1); echo "原数组:"; var_dump($arr); echo "获取数组中的不同值:"; var_dump(array_keys(array_count_values($arr))); ?>
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