php

Php variables:-

Starting with $sign

When u assing text to any variable then use double quotes for values “myname”

When u assing number then no need $age=22;

Remember always end variables with semicolon;

Php functions:-

Function function name()

{

// kuch bhi echo ho sakta hai using variable,if else,etc

//hamein both variable and echo inkey andar ki karna hai ……agar bahar karna hai to argument use karney padtey hai okk see later

}

Dekho ab in do curly brackets ke andar job hi echo ya print karwaogey use aap access kar saktey ho outside funcyion using

Function name();

Now arguments or pass value to functions :-

Function functionname($a)  //semicolon ni lagega and use $ bcz hamein var assign karna hai

{

// ab chahey aap yaha par echo karwado  aur values variable ki outside curly assign kardo to bhi chalega

}

//here u can assign value like $a=30; and get output functionname($a);

//remember to use argument in output of function okk

Now you can also get ur output in another variable like this :-

Function abc($a)

{

Print $a;

}

$a=”thisis a”;

$c=abc($a);    //function output ek alag variable mein hai aur kuch nahi hai

Print $c;

?>

Note header function:-

Header(“location:http://www.google.com”);

?>

Include function:-

Include(“textfile.txt”);

?>

Strlen function:-

Use to return length of string

Echo strlen “hello world!”;

?>

//it will give output 12 sochney ki baat hai without using any variables

Concatenation operator:  dot . used to join two strings kkey

Strops function :-

Used to search character/string with in a string

Echo strpos( “hello world”,”world”);

?>

Output will be 6 not 7 bcz string count from 0 not 1

Now if else

$a=34;

If (condition) { } Else { }

?>

Switch statement

Switch($variable name)   //semicolon yahan par ni lagega

{

 case ‘what u want to check’;

//code

Break;

Case ‘another’;

//code

…….

Example live

$x=1;
switch ($x)
{
case 1:
  echo "Number 1";
  break;
case 2:
  echo "Number 2";
  break;
case 3:
  echo "Number 3";
  break;
default:
  echo "No number between 1 and 3";
}
?>

Iski output ayegi number 1 but agar $x ki value 3 kardey to number 3 ayegi bcz ………bcz swith case ko match karega okkey

Agar $x=”tect hota like car ” to hamein kuch istarah case likhna panda tha in quotes

Case ‘car’;

Echo”this is car”;

Break;

Case’aeroplane’
………………..