What is PHP?
The acronym PHP initially stood for Personal Home Page.
As of version 3, it stands for PHP Hypertext Preprocessor. It is a general purpose server side scripting language that is used to develop:
- Dynamic Websites
- Custom Web Portal (Like ERP, CRM)
- Web Applications
- E-commerce Websites (Like Flipkart, Amazon, Paytm, Snapdeal etc)
- CMS – Content Management System
Importance of PHP?
- It costs low with cost effective database applications
- It is platform independent
- PHP supports all major web servers
- The existence of multiple security layers make PHP one of the most secure options for developing the most critical websites and web applications.
- PHP supports a wide array of databases including dataBase, MySQL etc.
History of PHP
- Designed by Rasmus Lerdorf
- Developer The PHP Development Team, Zend Technologies
- First appeared June 8, 1995; 21 years ago
- Stable release 7.1.0/ December 1, 2016
Basic Structure of PHP
<?php
//your code here
?>Example:
<!doctype html> <html> <head><title>Hello World Script</title></head> <body> <?php echo "<p>Hello World!</p>"; ?> </body> </html>
Printing statement in PHP
If you want to print/echo some string/variable or number in php
<?php $variable = "your string"; // echo $variable; // ?>
File Extension of PHP
-
PHP files have the file extension .php
Comment Line in PHP
- Single Line Comments
Single line comments start with //.
Any text between // and the end of the line will be ignored by PHP(will not be executed).
Example
echo 'This is a test'; // This is a one-line c++ style comment
- Multi-line Comments
Multi-line comments start with /* and end with */.
Any text between /* and */ will be ignored by PHP.
Example
/* This is a multi line comment yet another line of comment */ /* echo 'This is yet another test'; echo 'Hi'; */ echo 'One Final Test'; # This is a one-line shell-style comment
Variable Declaration
In PHP, a variable starts with the $ sign, followed by the name of the variable:
Example
<?php $Vraiable_name = "Hello world!"; $x = 5; $y = 10.5; ?>
A variable can have a short name (like x and y) or a more descriptive name (age, car name, total_volume).
Rules for PHP variables:
- A variable starts with the $ sign, followed by the name of the variable
- A variable name must start with a letter or the underscore character
- A variable name cannot start with a number
- A variable name can only contain alpha-numeric characters and underscores (A-z, 0-9, and _ )
- Variable names are case-sensitive ($age and $AGE are two different variables)
Bumtum Chota Bheem Large Baby Diaper Pants, 62 Count, Leakage Protection Infused With Aloe Vera, Cottony Soft High Absorb Technology (Pack of 1)
₹578.00 (as of December 21, 2024 19:21 GMT +05:30 - More infoProduct prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on [relevant Amazon Site(s), as applicable] at the time of purchase will apply to the purchase of this product.)
Vn care Silicon Corner Protector for Sharp Edges, Table Corners Edge Protector for Kids, Bed Corners Edge Protector for Furniture, Baby Proofing Edge & Corner Guards (Transparent, Pack of 12)
₹298.00 (as of December 21, 2024 19:21 GMT +05:30 - More infoProduct prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on [relevant Amazon Site(s), as applicable] at the time of purchase will apply to the purchase of this product.)
Philips Avent Pacifier Ultra air |Lets Your Baby's Skin Breathe | Orthodontic & BPA Free |2 Pack |6-18m | SCF085/60
₹556.00 (as of December 21, 2024 19:21 GMT +05:30 - More infoProduct prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on [relevant Amazon Site(s), as applicable] at the time of purchase will apply to the purchase of this product.)
Mee Mee Caring Baby Wet Wipes with lid, 72 Pcs (Aloe Vera, Pack of 3)
₹205.00 (as of December 21, 2024 19:21 GMT +05:30 - More infoProduct prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on [relevant Amazon Site(s), as applicable] at the time of purchase will apply to the purchase of this product.)
AEREX Premium Reusable Baby Cotton Cloth Diapers For 0 to 3 Years With White Insert Pads | Leak Proof Washable Diapers For New Born Babies | Adjustable Pocket Cloth Diaper Nappies (Multicolor, Pack of 4)
₹499.00 (as of December 21, 2024 19:21 GMT +05:30 - More infoProduct prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on [relevant Amazon Site(s), as applicable] at the time of purchase will apply to the purchase of this product.)
Pampers Premium Care Pants, Medium size baby Diapers, (M) 54 Count,7-12 kg Softest ever Pampers Pants
₹971.00 (as of December 21, 2024 19:21 GMT +05:30 - More infoProduct prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on [relevant Amazon Site(s), as applicable] at the time of purchase will apply to the purchase of this product.)
R for Rabbit Large L Size Premium Feather Diaper for Baby 9 to 14 kgs (24 Pack Offer)
₹476.00 (as of December 21, 2024 19:21 GMT +05:30 - More infoProduct prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on [relevant Amazon Site(s), as applicable] at the time of purchase will apply to the purchase of this product.)
Himalaya Gentle Baby Wipes - 72 Pieces (Pack of 2)
₹181.00 (as of December 21, 2024 19:21 GMT +05:30 - More infoProduct prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on [relevant Amazon Site(s), as applicable] at the time of purchase will apply to the purchase of this product.)
Philips Avent Natural Baby Feeding Bottle | No.1 Brand Recommended by Moms Worldwide | Ideal for 0 months+| Natural Response Technology Mimics Breastfeeding | Uniquely Designed Nipple releases milk only when baby drinks | Pack of 1 | SCY900/01
₹408.00 (as of December 21, 2024 19:21 GMT +05:30 - More infoProduct prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on [relevant Amazon Site(s), as applicable] at the time of purchase will apply to the purchase of this product.)
LuvLap 360° Joy Baby Walker 9+ Months | 3 Level Height Adjustment Walker with Switchable Food & Musical Toy Tray/Advanced Baby Activity Walker, Pink
₹1,999.00 (as of December 21, 2024 19:21 GMT +05:30 - More infoProduct prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on [relevant Amazon Site(s), as applicable] at the time of purchase will apply to the purchase of this product.)
amazon basics Multi Angle Desktop Foldable Stand Tablet/Mobile Stand Holder for iPhone, Android, Samsung, OnePlus, Xiaomi, Smartphones. Portable, for Your Bed,Home, Office, Home (Black)
₹99.00 (as of December 21, 2024 05:17 GMT +05:30 - More infoProduct prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on [relevant Amazon Site(s), as applicable] at the time of purchase will apply to the purchase of this product.)
Dyazo Water Resistant Laptop Sleeve with Handle Compatible for 15 Inch to 15.6" Inches laptops & Notebooks - Grey
₹299.00 (as of December 21, 2024 05:17 GMT +05:30 - More infoProduct prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on [relevant Amazon Site(s), as applicable] at the time of purchase will apply to the purchase of this product.)
TP-Link TL-WA850RE Single_Band 300Mbps RJ45 Wireless Range Extender, Broadband/Wi-Fi Extender, Wi-Fi Booster/Hotspot with 1 Ethernet Port, Plug and Play, Built-in Access Point Mode, White
₹1,299.00 (as of December 21, 2024 05:17 GMT +05:30 - More infoProduct prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on [relevant Amazon Site(s), as applicable] at the time of purchase will apply to the purchase of this product.)
HUMBLE® Spiral Charger Cable Protector Data Cable Saver Charging Cord Protective Cable Cover (25 Pieces)
₹99.00 (as of December 21, 2024 05:17 GMT +05:30 - More infoProduct prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on [relevant Amazon Site(s), as applicable] at the time of purchase will apply to the purchase of this product.)
Nice tutorial, very simple and clean
Hi Raju, You are welcome.