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In PHP, you can use the array_reverse() function to reverse the array. The array_reverse() function will reverse the order of the elements in the array, create a new array and return it. The syntax is "array_reverse(array,preserve)"; the parameter preserve can be omitted and is used to specify whether to retain the key names of the original array (only for numbers) Key name, non-numeric keys are not affected).
The operating environment of this tutorial: windows7 system, PHP version 8.1, DELL G3 computer
In PHP, you can use array_reverse () function to implement array reversal.
array_reverse() function returns an array in the reverse order of elements; it reverses the order of elements in the original array, creates a new array, and returns it.
Grammar format:
array_reverse(array,preserve)
| Parameters | Description |
|---|---|
| array | Required. Specifies an array. |
| preserve | Optional. Specifies whether to retain the original array key names. If set to TRUE, numeric keys will be preserved. Non-numeric keys are not affected by this setting and will always be retained. Possible values:
|
"Volvo","b"=>"BMW","c"=>"Toyota"); echo "原数组顺序："; var_dump($arr); echo "
数组反转后的顺序："; var_dump(array_reverse($arr)); var_dump(array_reverse($arr,true)); ?>
Extended knowledge: Use the for loop statement to reverse the index array
=0 ; $i--) { $res[]=$array[$i]; } echo "数组反转后的顺序："; var_dump($res); ?>
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