How to delete the specified value in the array in php

php method to delete the specified value in the array: You can delete it through the foreach statement combined with the usnet function, such as [foreach($array as $k=>$v){if($v == 'day'){unset($array[$k])}}].

The method is as follows:

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1. Utilization The foreach and unset() functions delete specific elements in the array

foreach($array as $k=>$v){
if($v == 'day'){
unset($array[$k])
}
}

The unset() function deletes the specified array value.

2. Use array_flip() function and unset() function to delete specific values ​​in the array

$arr = array_flip($arr);
unset($arr['world']);
$arr = array_flip($arr);
print_r($arr);

array_flip() is a reversal function that changes the original key name of the array into a key value , change the key value into the key name, so that the above operation is easy to understand.

3. Use array_search() and unset() functions to delete specific values ​​in the array

if(($key = array_search('day',$arr))){
unset($arr[$key]);
}

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.

4. The array_splice() function can play the same role as the unset() function

if(($key = array_search('day',$arr))){
array_splice($arr, $key,1);
}

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