Introduction php

What is PHP?

PHP stands for PHP: Hypertext Preprocessor
PHP is a server-side scripting language, like ASP
PHP scripts are executed on the server
PHP supports many databases (MySQL, Informix, Oracle, Sybase, Solid, PostgreSQL, Generic ODBC, etc.)
PHP is an open source software
PHP is free to download and use
What is a PHP File?

PHP files can contain text, HTML tags and scripts
PHP files are returned to the browser as plain HTML
PHP files have a file extension of ".php", ".php3", or ".phtml"

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Number Format In Javascript

Number.toFixed() : Formats any number for "x" number of trailing decimals. The number is rounded up, and "0"s are used after the decimal point if needed to create the desired decimal length. var profits=2489.8237 profits.toFixed(3) //returns 2489.824 (round up) profits.toFixed(2) //returns 2489.82 profits.toFixed(7) //returns 2489.8237000 (padding) Number.toPrecision() : Formats any number so it is of "x" length. Also called significant digits. A decimal point and "0"s are used if needed to create the desired length. var anumber=123.45 anumber.toPreci...

Use of indexOf and charAt in javascript

indexOf(): The indexOf() method returns the position of the first occurrence of a specified value in a string. This method returns -1 if the value to search for never occurs. example : <script type="text/javascript"> var str="Hello world!"; document.write(str.indexOf("d") + "<br />"); document.write(str.indexOf("WORLD") + "<br />"); document.write(str.indexOf("world")); </script> Output : 10 -1 6 charAt() The charAt() method returns the character at the specified index in a string. The index of the first character is 0, and the index of the last character in a string called "txt", is txt.length-1 <script type="text/javascript"> var str = "Hello world!"; document.write("First character: " + str.charAt(0) + "<br />"); document.write("Last character: " + str.charAt(str.l...

Check javascript is enable or disable

Hello there In our genreal practice of developing a webpage we use JAVASCRIPT. But do you know what will happen when in clients' browser javascript is disable and in your webpage you used it ?? Nothing will happen as per your expectation. It is good programming practice to check JAVASCRIPT is disabled or not . For example <noscript> <meta http-equiv = "refresh" content = "1;url=error.html" > </noscript> This will redirect to an error page if script is disabled. Just replace error.html with the url of your error page. Or you also can do this <noscript> <blink>Please enable javascript</blink> </noscript>

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