PHP count()

count() returns the total elements number of an array or an associative array.

<?PHP
	$arr=array(1,2,3,4,5,6,7,8,9);
    $len=count($arr);
	echo "$len";  //result is 9
	
	$arr = array("one"=>"Monday","two"=>"Tuesday","three"=>"Wednesday",
    "four"=>"Thursday","five"=>"Friday","six"=>"Saturday","seven"=>"Sunday");
	echo count($arr); //result is 7	
?>

count() is frequently used to loop through an array.

<?PHP
	$arr=array(1,2,3,4,5,6,7,8,9);
	for ($ii=0;$ii<count($arr);$ii++)
	{
	    echo "$ii, $arr[$ii]\n";
	}
	/*
	0, 1
	1, 2
	2, 3
	3, 4
	4, 5
	5, 6
	6, 7
	7, 8
	8, 9
	*/
?>

strlen() can be used to count the length of a string.

<?PHP
   $str = "This is a string.";
   echo strlen($str);  //result is 17
?>



:: PHP Tutorials Home ::
PHP String Functions
 • concatenation • echo
 • ereg • ereg_replace
 • explode • htmlspecialchars
 • preg_match • preg_replace
 • preg_split • print,sprintf
 • str_replace • strcmp
 • strpos • strrev
 • strrpos • strtr
 • substr • substr_replace
PHP Array Functions
 • array_diff • array_flip
 • array_intersect • array_key_exists
 • array_keys • array_merge
 • array_pop • array_push
 • array_rand • array_search
 • array_splice • array_unshift
 • array_values • asort & arsort
 • count • in_array
 • ksort • shuffle
 • sort
PHP Data Types
 • array • associative array
 • date & time • number
 • class, object • regular expression
 • string • variables
PHP Loop & Conditions
 • continue & break • for loop
 • foreach • if else
 • not equal • while
PHP File System Functions
 • copy • delete, unlink
 • dirname • download url
 • file_exists • is_file
 • mkdir • read file
 • scandir • write file
PHP Popular Topics
 • ajax • clone
 • comments • constants
 • cookie • database
 • defined • die
 • form validation • gd, draw images
 • global variables • header url
 • heredoc • mail
 • pass by reference • print
 • regular expression • sessions
 • threads • xml parse
PHP Math Functions
 • abs • cos
 • exp • floor & ceil
 • fmod • log
 • max & min • pow
 • round • sin
 • sqrt • tan
endmemo.com © 2020  Terms of Use | Home