PHP method to delete specified elements from an array

This article mainly introduces the relevant information about the implementation code of php deleting the specified elements in the array. Friends in need can refer to the following

php deleting the implementation code of the specified elements in the array

There is no function that can be used directly in PHP to delete specified elements of an array. Most of them can only encapsulate methods.

For example, the array_slice() function takes out a value in the array based on conditions and returns.

array_slice(array,offset,length,preserve)

array: Array
offset: Specifies the starting position of the element to be taken out. If it is a positive number, it is taken from the front to the back. If it is a negative value, the offset absolute value is taken from the back to the front.

<?php
$a=array(0=>"Dog",1=>"Cat",2=>"Horse",3=>"Bird");
print_r(array_slice($a,1,2));
?>

Output

Array ( [0] => Cat [1] => Horse )

There is also the array_shift() function to delete the array The first element in the array and returns the value of the deleted element.

The relative array_pop() function deletes the last element in the array.

Several functions After using it, I feel that array_search() is more practical. The array_search() function is the same as in_array(), searching for a key value in the array. If the value is found, the key of the matching element is returned. If not found, returns false

$array = array('1', '2', '3', '4', '5');
$del_value = 3;
unset($array[array_search($del_value , $array)]);//利用unset删除这个元素
print_r($array);

Output

array('1', '2', '4', '5');

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