How to delete a value element in a one-dimensional array in php

韦小宝
Release: 2023-03-19 20:22:02
Original
3509 people have browsed it

The following editor will share with you an article on how to delete a certain value element in a one-dimensional array in PHP. It has a good reference and value for learning PHP. I hope it will be helpful to everyone. If you are interested in PHP, please follow the editor to have a look

1. Write your own for loop

Remove $tmp from the array The value of the element

<?php
$tmp = &#39;324&#39;;
$arr = array(
&#39;0&#39; => &#39;321&#39;,
&#39;1&#39; => &#39;322&#39;,
&#39;2&#39; => &#39;323&#39;,
&#39;3&#39; => &#39;324&#39;,
&#39;4&#39; => &#39;325&#39;,
&#39;5&#39; => &#39;326&#39;,
);
Copy after login

Code

foreach( $arr as $k=>$v) {
 if($tmp == $v) unset($arr[$k]);
}
print_r($arr);
?>
Copy after login

At this time

Array
(
 [0] => 321
 [1] => 322
 [2] => 323
 [4] => 325
 [5] => 326
)
Copy after login

To reset the index, add a sentence

foreach( $arr as $k=>$v) {
 if($tmp == $v) unset($arr[$k]);
}
$arr = array_values($arr);
print_r($arr);
?>
Copy after login

The result at this time

Array
(
 [0] => 321
 [1] => 322
 [2] => 323
 [3] => 325
 [4] => 326
)
Copy after login
Copy after login
Copy after login
Copy after login

array_merge() can also achieve the same effect

foreach( $arr as $k=>$v) {
 if($tmp == $v) unset($arr[$k]);
}
$arr = array_merge($arr);
print_r($arr);
?>
Copy after login

The result at this time

Array
(
 [0] => 321
 [1] => 322
 [2] => 323
 [3] => 325
 [4] => 326
)
Copy after login
Copy after login
Copy after login
Copy after login

2. Prioritize using the functions that come with PHP, because they are implemented in C and are more efficient than writing them yourself.

Use array_search and array_splice, where array_splice automatically resets the sequence value.

$key=array_search($tmp ,$arr);
array_splice($arr,$key,1);
var_dump($arr);
Copy after login

Result at this time

Array
(
 [0] => 321
 [1] => 322
 [2] => 323
 [3] => 325
 [4] => 326
)
Copy after login
Copy after login
Copy after login
Copy after login

Best Practice

$arr = array_merge(array_diff($arr, array($tmp)));
var_dump($arr);
Copy after login

Result

Array
(
 [0] => 321
 [1] => 322
 [2] => 323
 [3] => 325
 [4] => 326
)
Copy after login
Copy after login
Copy after login
Copy after login

Here, if the array elements are complex data structures, comparison can also be achieved. Of course the data itself is still one-dimensional.

In the above example, $tmp is a value. If $tmp is an array or other complex data structure, delete all elements contained in $tmp from $array. The above method is also valid

$arr = array_merge(array_diff($arr, $tmp));
var_dump($arr);
Copy after login

The above PHP method of deleting a certain value element in a one-dimensional array is all the content shared by the editor. I hope it can give you a reference!

Related recommendations:

php function array_pop() that deletes the last element in the array

php deletes the last element in the array by the addslashes() function Function to add backslashesstripslashes()

php removes whitespace characters at the end of the string function chop()

The above is the detailed content of How to delete a value element in a one-dimensional array in php. For more information, please follow other related articles on the PHP Chinese website!

Related labels:
source:php.cn
Statement of this Website
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn
Popular Tutorials
More>
Latest Downloads
More>
Web Effects
Website Source Code
Website Materials
Front End Template
About us Disclaimer Sitemap
php.cn:Public welfare online PHP training,Help PHP learners grow quickly!