php loop through associative array code example

Example 1: php foreach associative array

$arr = array(
  'key1' => 'val1',
  'key2' => 'val2',
  'key3' => 'val3'
);

foreach ($arr as $key => $val) {
  echo "$key => $val" . PHP_EOL;
}

Example 2: Associative array in php

<?php 
/* 
There are 3 Types of array in php  
1. Indexed arrays - Arrays with a numeric index
2. Associative arrays - Arrays with named keys
3. Multidimensional arrays - Arrays containing one or more arrays

This is the second one - Associative arrays
*/

$age = array("Samy"=>"35", "Naveen"=>"37", "Amit"=>"43");
echo "Mr.Samy is " . $age['Samy'] . " years old.";

?>

Example 3: how to loop with while in php for array associative

$assocarray = array('a' => 1, 'b' => 2, 'c' => 3);
$keys = array_keys($assocarray);
rsort($keys);
while (!empty($keys)) {
    $key = array_pop($keys);
    echo $key . ' = ' . $assocarray[$key] . '<br />';
};