


Detailed explanation of steps to delete value elements in one-dimensional array in PHP
This time I will bring you PHP deletionOne-dimensional arrayDetailed explanation of the steps of median element, PHPNotesWhat are the precautions for deleting the median element of one-dimensional array? The following is a practical case , let’s take a look.
1. Write your own for loop
Remove the value of the $tmp element from the array
<?php $tmp = '324'; $arr = array( '0' => '321', '1' => '322', '2' => '323', '3' => '324', '4' => '325', '5' => '326', );
Code
foreach( $arr as $k=>$v) { if($tmp == $v) unset($arr[$k]); } print_r($arr); ?>
At this time
Array ( [0] => 321 [1] => 322 [2] => 323 [4] => 325 [5] => 326 )
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); ?>
At this time the result
Array ( [0] => 321 [1] => 322 [2] => 323 [3] => 325 [4] => 326 )
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); ?>
At this time the result
Array ( [0] => 321 [1] => 322 [2] => 323 [3] => 325 [4] => 326 )
2. Prioritize using PHP’s built-in functions, 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);
Result at this time
Array ( [0] => 321 [1] => 322 [2] => 323 [3] => 325 [4] => 326 )
Best Practice
$arr = array_merge(array_diff($arr, array($tmp))); var_dump($arr);
Result
Array ( [0] => 321 [1] => 322 [2] => 323 [3] => 325 [4] => 326 )
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);
I believe you have mastered the method after reading the case in this article. For more exciting information, please pay attention to other related articles on the php Chinese website!
Recommended reading:
Detailed explanation of the steps to implement regular expression group capture in PHP
Detailed explanation of the use of automatic loading of PHP files
The above is the detailed content of Detailed explanation of steps to delete value elements in one-dimensional array in PHP. For more information, please follow other related articles on the PHP Chinese website!

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