Display 2D Indexed Arrays in PHP

The following article demonstrates how to Display 2D Indexed Arrays in PHP.

Example with numerical indices. The following code shows a 2D array with numeric indices.

$matrix = array(
    array(1, 2, 3),
    array(4, 5, 6),
    array(7, 8, 9)
);

// Display the array
foreach ($matrix as $row) {
    foreach ($row as $value) {
        echo $value . " ";
    }
    echo "<br>";
}

The following output will be displayed.

1 2 3 
4 5 6 
7 8 9

Example with string indices. The following example shows a 2D array with string indices.

$table = array(
    array("name" => "John", "age" => 25, "city" => "New York"),
    array("name" => "Mary", "age" => 30, "city" => "London"),
    array("name" => "Bob", "age" => 20, "city" => "Paris")
);

// Display the array
foreach ($table as $row) {
    foreach ($row as $key => $value) {
        echo $key . ": " . $value . " ";
    }
    echo "<br>";
}

The following output will be generated.

name: John age: 25 city: New York 
name: Mary age: 30 city: London 
name: Bob age: 20 city: Paris

Example with mixed indices. Likewise, we can have mixed indices.

$items = array(
    array("item_id" => 1, "name" => "Apple", "price" => 1.5),
    array("item_id" => 2, "name" => "Banana", "price" => 2.0),
    array("item_id" => 3, "name" => "Orange", "price" => 1.0)
);

// Display the array
foreach ($items as $row) {
    foreach ($row as $key => $value) {
        echo $key . ": " . $value . " ";
    }
    echo "<br>";
}

The following output shows the mixed indices.

item_id: 1 name: Apple price: 1.5 
item_id: 2 name: Banana price: 2 
item_id: 3 name: Orange price: 1

Example with dynamic indices. Similarly, we can have dynamic indices as shown below.

$grades = array();
$grades[] = array(80, 90, 70);
$grades[] = array(75, 85, 95);
$grades[] = array(60, 65, 70);

// Display the array
foreach ($grades as $row) {
    foreach ($row as $value) {
        echo $value . " ";
    }
    echo "<br>";
}

The following output will be shown.

80 90 70 
75 85 95 
60 65 70

Example with the empty 2D array. In fact, we can have an empty @D array.

$empty_array = array(
    array(),
    array(),
    array()
);

// Display the array
foreach ($empty_array as $row) {
    foreach ($row as $value) {
        echo $value . " ";
    }
    echo "<br>";
}

This will be the output.

<br>
<br>
<br>

Basically, in all these examples, I used nested loops to iterate over each row and column in the 2D array. Also, I have used the echo statement to output the values in a readable format. Moreover, You can customize the output by using any HTML tags or formatting within the echo statement.

Further Reading