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Delete method: 1, use the "foreach ($arr as $key= > $value" statement to loop through the array; 2, in the loop body, use the "$key%2==0" statement to determine whether the key is even; 3, if it is an even number, use the "unset ($arr [$key])" statement to delete the element.

Operating environment of this tutorial: windows7 system, PHP7.1 version, DELL G3 computer

Php deletes elements with even keys in the array

Implementation method:

Loop through the array using the foreach statement

Foreach ($array as $key = > $value) {statement block;}

Iterate through the given $array array, assigning the value of the current array to $value and the key name to $key in each loop.

In the body of the loop, use the $key%2==0 statement to determine whether the key is even.

If even, delete using the unset () function

Implementation code:

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