Array() / Array_fill() / Array_Keys() in php

Array() / Array_fill() / Array_Keys() in php

<?php
// function 1:  array()
$arr=array();
echo "Empty array created";
echo "<pre>";  print_r($arr); echo "</pre>";
// array() create an empty array

// function 2:  array_fill(start_index, num, value)
$arr=array_fill(0, 5, "test");
echo "Array filled with value";
echo "<pre>";  print_r($arr); echo "</pre>";
$arr[1]="failed";
$arr[3]="failed";
echo "Array after changes";
echo "<pre>";  print_r($arr); echo "</pre>";
// array_fill() fill the array with value given in parameter

// function 3:  arrays_keys(array,value)
echo "Keys where value is test in array";
$keyz=array_keys($arr,"test");
echo "<pre>";  print_r($keyz); echo "</pre>";
// arrays_keys() return the array of keys where value is same as parameter

?>