How to remove blank spaces from array values ​​in php

php method to remove empty elements from array values: 1. Use "array_filter(array)" to delete empty elements in the array; 2. Use foreach or while syntax structures to delete empty elements in the array. The syntax is as follows: foreach( $arr as $k=>$v){if( !$v )unset( $arr[$k] );}}".

The operating environment of this tutorial: Windows 10 system, PHP version 8.1, DELL G3 computer

How to remove blank array values ​​in php?

php Array removes null values ​​array_filter() method

• ##array_filter()

Calling method: array_filter(array) Parameter description: array is the object of the operation, we will delete the empty elements

Instance:

Result:

Array (
[a] => abc
[b] => bcd
[c] => cde
[d] => def
)

• foreach or while, use these two syntax structures to delete empty elements in the array. The simple code is as follows:

<?php
foreach( $arr as $k=>$v){
if( !$v )
unset( $arr[$k] );
}
?>

And I feel pretty good about myself, but it’s not very efficient. I’ve tried it before, first converting $arr to an object, and then using the characteristics of the object to delete it, because: foreach copies the current array of operations, and every operation Each foreach copy copies a variable. If there are too many foreachs on the page, it will be a huge waste.

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