php associative array keys code example

Example 1: php all keys in array

<?php
$array = array(
    'fruit1' => 'apple',
    'fruit2' => 'orange',
    'fruit3' => 'grape',
    'fruit4' => 'apple',
    'fruit5' => 'apple');

$keys = array_keys($array);		// return array
$values = array_values($array);	// return array
?>

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: array key value php

<?php
$age=array("Peter"=>"35","Ben"=>"37","Joe"=>"43");
foreach($age as $x=>$x_value)
  {
  echo "Key=" . $x . ", Value=" . $x_value;
  echo "<br>";
  }
?>

Example 4: associative array php

// Associative Array in PHP

/******** ARRAY TYPES  ************************************************
There are basically 03 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
***********************************************************************/

//EXAMPLE
//This is the second one - Associative arrays

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