Php : Tutorial 1

Php: Tutorial 1

Doston pichle post mein aapne padha web services ,web development ke baarein mein ki kis trah web apps develop karne ke liye hum diff -diff languages use krte hai eg. Php,Asp.net etc.
Aaj hum baat karte hai php ki .
PHP is a recursive acronym for HyperText Preprocessor .Php ek bht hi assan language hai use kerne ke liye . Aaj hum php start karnege ek dum basic level se .
Sabse pahle iske server installation ka method .
Jaise aapne pichle post mein padha tha ki server install karne ke liye WAMP or XAMPP use hota hai.
Main XAMPP use krta hun bcoz mughe uske features ache lgte hai.Aur ye use karne mein easy bhi hai


so XAMPP install karne ke liye click   karein
phir jab ye download ho jaye to use install karein
phir aapko aisi screen dikayi degi .

iske baad aap apache ko start kar de jise aapka virtual server start ho jayega. Uske baad aap apne pc ke browser mein "http://localhost/" type karein.

 phir jaise hi aap enter press karenge to aapko aisi screen dikahi degi

 isko use karne ke liye aapko apni sabhi files "C:\xampp\htdocs" yahan save karni hogi.
iske baad aap isse use kar skte hai.

agr aap koi alag folder bana kar use krna chte hai to use kr skte hai
lekiin vo folder "htdocs" ke ander hi hona chaiye jisse ki aap usko access kar sake.
eg.

 jaise maine yahan project naam ka folder create kiya hai.
Aap bhi aise hi folder create kar skte hai.
folder ko url se access karne ke url mein thoda change karein.

Url Changes

localhost ke aage "/" daal ke apne folder ka naam likhe jisse ki us folder ko aap access kar ske.
agr aap folder ke aage "/" daal ke file ka naam type krte hai to vo file run ho jayegi.

Php ka code "<?php" se start aur  "?>" pe khtm hota hai .
<?php
//code here 
?>
Php sabhi types ke datatypes ko support krta hai eg. int, float,double,char etc.
php mein code krna bht assan hai .Php mein kisi bhi datatype ko define karne ki koi need hai jaise hum dusri langages mein krte hai eg. in Java 
int i="12";
same in C++.
But yahan aisa kuh bhi nahi hai yahan bus aapko varibale ke aage "$" ka sign lagana hai jisse aapka variable define ho jayega. eg.
$i="12";
jiase ki dekha aapne ki yahan kisi bhi datatype class ko call nahi karna pada .
PHP mein print kar vana bhi bht assan hai yahan bus aapko "echo" type krna hai aur aapka jo bhi msg echo mein hoga vo vahan print ho jayega . eg. 
<?php
echo "hi";
?>
Jaisa ki aur sabhi languages main hota hai ki jo bhi "    " ke ander hota hai vahi print hota hai .But agr hum " " ki jgh ' ' (single qotes) use karein to bhi msg print hoga php mein.
Agr hamne variables ki value print karni hi to hum use echo ke saath use kar skte hai .Agr hum var. ko ' ' mein type karenge to vo as itis print hoga but agr hum usse " " mein type karenge to uski value print hogi eg.
<?php
$hi="2";
echo "2,";
echo "$hi,";
echo $hi.",";
echo '$hi';
?>
output:
2,2,2,$hi


Iss code ko aap anpe editor mein copy karein aur file ko ".php" se save karein.