How to remove specified elements from an array in php

php method to remove specified elements from an array: 1. Use array_splice() function, syntax "array_splice(array,start,length,array)"; 2. Use unset() function, syntax "unset (var) ".

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

php removes the array specification Element

Method one:

Output:

array(4) { [0]=> int(1) [1]=> int(5) [2]=> int(7) [3]=> int(8) }

Method two:

$value)
{
  if ($value === 3)
    unset($arr2[$key]);
}
var_dump($arr2);
?>

Output:

array(4) { [0]=> int(1) [2]=> int(5) [3]=> int(7) [4]=> int(8) }

Summary:

You can see that there is a difference between using array_splice() to delete specific values ​​and using unset to delete specific values.

If the array_splice() function is deleted, the index value of the array will also change.

If the unset() function is deleted, the index value of the array will not change.

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