PHP substr()

substr() cuts a string with specified offset and length.

<?PHP
	$str="The best time is no time at that time";
    echo substr($str,0,3);  //The
	echo substr($str,4,4);  //best
?>

If no length is specified, the function returns the substring from the offset till the end of string.

<?PHP
	$str="The best time is no time at that time";
    echo substr($str,3);  //best time is no time at that time
?>

substr() also supports negative numbers.

<?PHP
	$str="The best time is no time at that time";
    echo substr($str,-3);  //ime
    echo substr($str,4,-3);  //best time is no time at that t
?>

Function substr_count() counts the occurrence of a substring in an input string.

<?PHP
    $str = "<li><a href=\"http://www.endmemo.com/index.php\">EndMemo</a></li>"    
	echo substr_count($str, "li"); //result is 2
?>

preg_match_all() can get the number of all matches using regular expression.

<?PHP
	$str = "match Can Be Case Insensitive with i modifier";
    echo preg_match_all("/se/",$str); //2
?>



:: 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