TECH SUPPORT

STRING: Pre-defined Functions - PHP to JavaScript

	String/Integer - PHP	String/Integer JavaScript
Is String?	is_string($str);	typeof(str)=="string";
Is Integer or Float	is_int ( mixed $var ); is_numeric ( mixed $var ); is_float ( mixed $var );	isNaN(integ); Example: document.write(isNaN(348)) produces: false
String Length	strlen($str);	str.length;
Convert to Upper or Lower	strtolower(str); strtoupper(str);	str.toLowerCase(); str.toUpperCase();
Replace text within a portion of a string	str_replace( $look-for-this-text, $replace-it-with-this-text, $str ); Example: $bodytag = str_replace("%body%", "black", "<body text='%body%'>"); Produces: `<body text='black'>`	str.replace( look-for-this-text, replace-it-with-this-text );
Return part of a string	substr($str, $start, $length); Example: echo substr('abcdef', 1); produces: bcdef echo substr('abcdef', 1, 3); produces: bcd	str.substr(int start, int lenght); var str = 'Hello world!'; alert(str.substring(0,4)); produces 'Hell' str.substring(int start, int end)); var str = 'Hello world!'; alert(str.substring(1,4)); produces 'ello'
Return a character at a certain position	substr($str, $position, $length=1); Example: echo substr('Hello World', 6, 1); produces: W	str.charAt(char); Example: var hello="Hello World"; var char=hello.charAt(6); produces: W alert('The 6th character is ' + char + '.');
Find position # of first occurrence of a string	strpos('abc', 'b'); produces: 1 strpos( 'abcdef abcdef', 'a', 1); produces 7, not 0	var str = 'Hello world'; positionofW = str.indexOf('W'); document.write(positionofW); produces: 6 alert('The a is at position ' + positionofW + '.');
Find first occurrence of a string	strstr($stack, $needle, bool $before_needle) $email = 'name@example.com'; $domain = strstr($email, '@'); echo $domain; // prints @example.com $user = strstr($email, '@', true); echo $user; // prints name	stack.substring( stack.indexOf(needle) );
To Split String into Arrays	explode(splitter, str); Example: $str = 'Hello Array World'; $strarray = new Array(); $strarray = explode(" ", $str); $strarray[0] = 'Hello'; $strarray[1] = 'Array'; $strarray[2] = 'World';	str.split(splitter); Example: var str = 'Hello Array World'; var strarray = new Array(); strarray = str.split( " "); strarray[0] = 'Hello'; strarray[1] = 'Array'; strarray[2] = 'World';
Replace text within a portion of a string	substr_replace( $str, $replacement, $index, $length );	str.replace( str.substring( index, (index+length) ), replacement );
Strip HTML and PHP tags from a string	$stripstr=striptags($str);	stripstr=str.replace(/<[^>]+>/g, '');