What is the array_unshift method in PHP?
The array_unshift method can be used to add one or more elements to the beginning of an array.
Syntax
array_unshift(array, value, ...)
Parameters
array: the array to add values to.value: the value to be added.
Points to note
-
This method appends the elements in the order in which it is passed as an argument.
-
The numeric index of the elements is reassigned, starting from zero.
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Non-numeric keys remain unchanged.
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This method returns the new length of the array after it appends the passed elements.
Example
<?php$numbers = [1,2,'three' => 3,4];printArray($numbers);array_unshift($numbers, 0);printArray($numbers);array_unshift($numbers, -2, -1);printArray($numbers);// function to print the arrayfunction printArray($array){echo "The array is ";print_r($array);echo "\n";}?>
In the code above:
-
We created an array called
numbers. -
We created a
printArrayfunction to print the array. -
We called the
array_unshiftmethod with single and multiple arguments to append elements to the beginning of the array.
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