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I'm learning array and loop in php. But can't print the array with keys & values. How can I do this?

<?php $marks = array ( "Alice" => array ( "physics" => "60", "math" => "65" ), "Bob" => array ( "physics" => "40", "math" => "45" ) ); foreach ( $marks as $key => $value) { foreach ( $key as $key2 => $value2 ) { echo $key . " : " . $key2 . " - " . $value2 . "<br>"; }; }; ?>
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    second forEach should be like foreach ( $value as $key2 => $value2 ) { Commented Apr 7, 2019 at 15:40

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In the nested foreach you have to iterate over the $value which holds the array.

foreach ( $marks as $key => $value) { foreach ( $value as $key2 => $value2 ) { // -------^^^^^^------- echo $key . " : " . $key2 . " - " . $value2 . "<br>"; } };
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Use this

foreach ( $marks as $key => $value) { foreach ( $value as $key2 => $value2 ) { echo $key . " : " . $key2 . " - " . $value2 . "<br>"; } }
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This way it could be more readable to fix it and clear up confusion:

 $marks = array( 'Alice' => array( 'physics' => 60, 'math' => 65, ), 'Bob' => array( 'physics' => 40, 'math' => 45, ), ); // Loop students foreach($marks as $name => $grades){ // Loop their grades foreach ($grades as $subject => $score){ echo $name . ' : ' . $subject . ' - ' . $score . '<br>'; } }

Please note that the numbers are without quotes. This will allow you to use them as numbers to do further calculations.

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