In php foreach loops are used to access all the elements of the array. The syntax is as

foreach ($array as $key =>$value) 
{ 

}

In above syntax , the no. of times loop get executed is equal to the no of elements in the array.
the same above syntax can be written as

foreach ($array as $value) {

}

In the above code the value of the array gets assigned to the variable $value every time the loop gets executed.

foreach loop always works on the array only with the key-value pair.

example:

<?php 
$days = array("Monday", "Tuesday", "Wednesday","Thursday","Friday","Saturday", "Sunday" ); 

foreach ($days as $value) {
    echo "$value <br>";
}
?>

output:
Monday
Tuesday
Wednesday
Thursday
Friday
Saturday
Sunday