is_array():
is_array() fucntion used to check whether the variable is array or not. If it is an array, it simply return 1(true) otherwise it returns nothing. Let's see a example below:
<?php
$x = "World";
echo "x is " . is_array($x) . "<br>"; //x will return nothing,cause not an array
$y = array("earth", "ocean", "desert");
echo "y is " . is_array($y) . "<br>"; //y will return 1,cause it is an array
?>
The result will be: x is
y is 1
in_array():
in_array() fucntion used to check whether the specific value is in array or not. The search parameter is case sensitive. Let's see a example below:
<?php
$flower = array("Lili", "Cosmos", "Sunflower", "Orchid", "Rose");
if (in_array("Orchid", $flower )) //'Orchid' is case sensitive, you can not use 'orchid'
{
echo "This flower found in flower array!";
}
else
{
echo "Not found!!!";
}
?>
The result will be: This flower found in flower array!