How to delete the key of an array in php
In PHP, there are several methods to delete the key of an array:
1. Use the unset function:
unset($array[key]);
Example:
1 2 3 |
|
Output result:
1 |
|
2. Use the array_filter function:
The array_filter function can filter the elements in the array. If the callback function returns false, filter Remove the element. If true is returned, the element is retained.
Example:
1 2 3 4 5 |
|
Output result:
1 |
|
3. Use the array_diff_key function:
The array_diff_key function returns one of the arrays and all the keys of the other arrays difference set.
Example:
1 2 3 |
|
Output result:
1 |
|
The above are three common methods of deleting array keys, which can be flexibly selected and used in combination according to the actual situation.
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