php array is associative

1<?php 
2/* 
3There are 3 Types of array in php  
41. Indexed arrays - Arrays with a numeric index
52. Associative arrays - Arrays with named keys
63. Multidimensional arrays - Arrays containing one or more arrays
7
8This is the second one - Associative arrays
9*/
10
11$age = array("Samy"=>"35", "Naveen"=>"37", "Amit"=>"43");
12echo "Mr.Samy is " . $age['Samy'] . " years old.";
13
14?>

1function isAssoc(array $arr)
2{
3    if (array() === $arr) return false;
4    return array_keys($arr) !== range(0, count($arr) - 1);
5}
6
7var_dump(isAssoc(['a', 'b', 'c'])); // false
8var_dump(isAssoc(["0" => 'a', "1" => 'b', "2" => 'c'])); // false
9var_dump(isAssoc(["1" => 'a', "0" => 'b', "2" => 'c'])); // true
10var_dump(isAssoc(["a" => 'a', "b" => 'b', "c" => 'c'])); // true
11

1<?php 
2  /*
3  there are three type of array
4  	1 - Indexed array
5  */
6 	$a = array('a','b','c');
7	$b = ['a','b','c'];
8	/*
9    2 - Associative array
10    */
11	$c = array(
12    	'keyOne'=>'valueOne',
13      	'keyTwo'=>'valueTwo'
14    );
15	$d = [
16      'keyOne'=>'valueOne',
17      'keyTwo'=>'valueTwo'
18    ];
19/*
20    3 - Multidimensional  array
21    */
22	$c = array(
23    	'keyOne'=>array('a','b','c'),
24      	'keyTwo'=>array('a'=>'1','b'=>'2')
25    );
26	$d = [
27      'keyOne'=>['a','b','c'],
28      	'keyTwo'=>['a'=>'1','b'=>'2']
29    ];
30  ?>

1<?php
2$arr = array('fruit' => 'mango', 'vegetable' => 'tomato', 'thing' => 'bag');
3echo $arr['fruit'];
4/*OUTPUT
5mango*/
6?>

1// Associative Array in PHP
2
3/******** ARRAY TYPES  ************************************************
4There are basically 03 Types of array in php  
51. Indexed arrays          => Arrays with a numeric index
62. Associative arrays      => Arrays with named keys
73. Multidimensional arrays => Arrays containing one or more arrays
8***********************************************************************/
9
10//EXAMPLE
11//This is the second one - Associative arrays
12
13$age = array("Peter"=>"35", "Naveen"=>"37", "Amit"=>"43");
14echo "Mr.Samy is " . $age['Peter'] . " years old.";