php count string in array

1
2<?php
3$a[0] = 1;
4$a[1] = 3;
5$a[2] = 5;
6var_dump(count($a));
7
8$b[0]  = 7;
9$b[5]  = 9;
10$b[10] = 11;
11var_dump(count($b));
12
13var_dump(count(null));
14
15var_dump(count(false));
16?>
17  /* result
18  
19  
20int(3)
21int(3)
22
23Warning: count(): Parameter must be an array or an object that implements Countable in … on line 12 // as of PHP 7.2
24int(0)
25
26Warning: count(): Parameter must be an array or an object that implements Countable in … on line 14 // as of PHP 7.2
27int(1)
28
29*/
30<?php
31$a=array("A","Cat","Dog","A","Dog");
32print_r(array_count_values($a));
33?>
34 <?php
35 $vegetables = ["Cabbage", "Carrot", "Lettuce"];
36 $arrayLength = count($vegetables);
37 echo $arrayLength; //returns 3
38?>
39$cars=array("Volvo","BMW","Toyota");
40echo count($cars);
41//returns 3

1
2<?php
3$a[0] = 1;
4$a[1] = 3;
5$a[2] = 5;
6var_dump(count($a));
7
8$b[0]  = 7;
9$b[5]  = 9;
10$b[10] = 11;
11var_dump(count($b));
12
13var_dump(count(null));
14
15var_dump(count(false));
16?>
17  /* result
18  
19  
20int(3)
21int(3)
22
23Warning: count(): Parameter must be an array or an object that implements Countable in … on line 12 // as of PHP 7.2
24int(0)
25
26Warning: count(): Parameter must be an array or an object that implements Countable in … on line 14 // as of PHP 7.2
27int(1)
28
29*/
30
31