PHP Syntax Basics

2. Class name, function name is case-insensitive
   

   Variable, constant-differentiated

3. Weak language:

   1. Shaping, floating point, character, Boolean

   2. Array               

      650) this.width=650; "Src=" http://s3.51cto.com/wyfs02/M01/4D/E6 /wkiol1rcudqrqob5aad3rzodi0i532.jpg "title=" is not named. JPG "alt=" wkiol1rcudqrqob5aad3rzodi0i532.jpg "/>    

      JavaScript can only

      650) this.width=650;" src = "Http://s3.51cto.com/wyfs02/M01/4D/E6/wKioL1RcUJ-SVWIpAADa_wHgj5o096.jpg" title= "is not named. JPG "alt=" wkiol1rcuj-svwipaada_whgj5o096.jpg "/>

   3. Array traversal

      650) this.width=650;" src= "http:/ S3.51cto.com/wyfs02/m00/4d/e8/wkiom1rculrzqqdiaac8szuipjc984.jpg "title=" is not named. JPG "alt=" wkiom1rculrzqqdiaac8szuipjc984.jpg "/>

   4. Null, class, resource

   5. Variable reference $a = & $b;

   6. Static variable

      650) this.width=650; "Src=" Http://s3.51cto.com/wyfs02/M02/4D/E8/wKiom1RcVPChlMzTAAFoLZKtI _i796.jpg "title=" is not named. JPG "alt=" wkiom1rcvpchlmztaafolzkti_i796.jpg "/>
      

5. Type conversions

7. Php

String to Number

echo $a + $b;

$a = "123a"; $b = 1; 124

$a = "123"; $b = 1; 124

$a = "a123"; $b = 1; 1

Numeric to String

. operator

Js

Numeric to String

var i = "123a"; var j = 1;

document.write (I+J); string: 123a1

String to Number

parseint ()

5. The assignment operator assigns the value and returns the assigned value

$a = 5;

$b = 10;

$c = ($a = $b);

Echo $c; Ten

6.

PHP Syntax Basics