Php array- how to search index of value , remove value key and reindex array

array_search (“content value “,arrayname) //  gives the index number of value given in array

$input1 = array(4,5,7,6,3,9,8); // let us consider its array

$ser = array_search(5,$input1); // $ser will give value 1 means the index value  .. starts from 0

 //remove content from array   php

unset($in[$ser]); // unset function with syntaxt

// reindexing array php

//array_splice($input1,0,0);