PHP: array_reverse Manual

The array_reverse function is used to reverse the order of the elements in an array. This function was introduced in PHP 4.0. The array_reverse() function is used to reverse the order of the elements in an array. Set the $preserve_keys to true to preserve the keys in the original array. Let’s take some examples of using the PHP array_reverse() function. This code can help in recursive reversing of the array…

Possible values are true and false. Non-numeric keys will always be preserved. This function reverses the order of elements in an array.

Below is the code to reverse an array, The goal here is to provide with an optimal solution. Compared to the approved solution above, my solution only iterates for half a length times. It can make a solution little faster when dealing with huge arrays. Preserve_keys If set to true numeric keys are preserved.

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If the second parameter is given and istrue, the keys for the elements are preserved; if not, the keys are lost. The parameter ‘array’ specifies the name of the array. ‘preserve_key’ is an optional parameter. It specifies whether array preserve numeric key or not. It has boolean value ‘true’ OR ‘false’. If it is set to true, then it preserves the numeric key.

Non-numeric keys are not affected by this setting and will always be preserved. Specifies if the function should preserve the array’s keys or not. Notice that a function reverses an outer array in the nested array above.

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