PHP started out every bit a pocket-sized opened upward source projection that evolved every bit to a greater extent than in addition to to a greater extent than people establish out how useful it was. Rasmus Lerdorf unleashed the stimulate down version of PHP way dorsum inwards 1994.
- PHP is a recursive acronym for "PHP: Hypertext Preprocessor".
- PHP is a server side scripting linguistic communication that is embedded inwards HTML. It is used to larn by dynamic content, databases, session tracking, fifty-fifty construct entire e-commerce sites.
- It is integrated with a reveal of pop databases, including MySQL, PostgreSQL, Oracle, Sybase, Informix, in addition to Microsoft SQL Server.
- PHP is pleasingly zippy inwards its execution, peculiarly when compiled every bit an Apache module on the Unix side. The MySQL server, in 1 trial started, executes fifty-fifty real complex queries with huge trial sets inwards record-setting time.
- PHP supports a large reveal of major protocols such every bit POP3, IMAP, in addition to LDAP. PHP4 added back upward for Java in addition to distributed object architectures (COM in addition to CORBA), making n-tier evolution a possibility for the stimulate down time.
- PHP is forgiving: PHP linguistic communication tries to hold upward every bit forgiving every bit possible.
- PHP Syntax is C-Like.
Common Uses of PHP
PHP performs organization functions, i.e. from files on a organization it tin sack create, open, read, write, in addition to closed them. The other uses of PHP are:
- PHP tin sack handgrip forms, i.e. get together information from files, relieve information to a file, thru electronic mail yous tin sack transportation data, provide information to the user.
- You add, delete, alter elements within your database thru PHP.
- Access cookies variables in addition to fix cookies.
- Using PHP, yous tin sack limit users to access around pages of your website.
- It tin sack encrypt data.
Characteristics of PHP
Five of import characteristics brand PHP's practical nature possible:
- Simplicity
- Efficiency
- Security
- Flexibility
- Familiarity
"Hello World" Script inwards PHP
To larn a experience of PHP, stimulate down start with unproblematic PHP scripts. Since "Hello, World!" is an essential example, stimulate down nosotros volition practise a friendly piddling "Hello, World!" script.
As mentioned earlier, PHP is embedded inwards HTML. That agency that inwards alongside your normal HTML (or XHTML if you're cutting-edge) you'll convey PHP statements similar this:
<html><head><title>Hello World</title><body><?php echo "Hello, World!";?></body></html>
It volition gain the next result:
Hello, World!
If yous essay out the HTML output of the inwards a higher house example, you'll discover that the PHP code is non introduce inwards the file sent from the server to your Web browser. All of the PHP introduce inwards the Web page is processed in addition to stripped from the page; the alone matter returned to the customer from the Web server is pure HTML output.
All PHP code must hold upward included within 1 of the 3 special markup tags ate are recognized past times the PHP Parser.
<?php PHP code goes hither ?><? PHP code goes hither ?><script language="php"> PHP code goes hither </script>
Most mutual tag is the <?php...?> in addition to nosotros volition likewise usage the same tag inwards our tutorial.
From the side past times side chapter, nosotros volition stimulate down with PHP Environment Setup on your auto in addition to hence nosotros volition dig out close all concepts related to PHP to brand yous comfortable with the PHP language.
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