In this tutorial, you shall learn how to write nested foreach statements in PHP, with the help of example programs.
PHP – Nested foreach
Nested foreach is a statement in which we have a foreach as statement inside a foreach.
Nested foreach can used to iterate over values of multidimensional arrays in PHP.
Examples (2)
1. Iterate over 2D Indexed Array using nested foreach
Let us take a two-dimensional array, and use nested foreach to traverse the elements of the array.
PHP Program
</>
Copy
<?php
$array2D = array(
array(7, 8, 9),
array(4, 5, 6),
array(1, 2, 3)
);
foreach ($array2D as $array1D) {
foreach ($array1D as $element) {
echo $element;
echo " ";
}
echo "<br>";
}
?>
Output
2. Iterate over an Associative Array where the values are Arrays using foreach
In the following program, we take a two dimensional array and iterate over the elements in inner-arrays using nested foreach statement.
PHP Program
</>
Copy
<?php
$arr = array(
"a" => array( 41, 96, 65 ),
"b" => array( 88, 44, 22 ),
"c" => array( 12, 23, 34 )
);
foreach ($arr as $key => $value) {
echo $key . '<br>';
foreach ($value as $element) {
echo $element . ' ';
}
echo '<br>';
}
?>
Output
Conclusion
In this PHP Tutorial, we learned what a nested foreach statement is, and how to use this statement to iterate over a multidimensional array.