PHP syntax and rules | Sharp Tutorial

PHP Introduction

Working with Forms

PHP with MySQl

Advanced PHP

Object Oriented PHP

PHP Syntax

PHP code starts with <?php and ends with ?> inside these tags php code is written. PHP statements are terminated with semicolon(;) except some statements like if else loop etc.

In PHP the commands are not case sensite while the variables names are case senisitve .

echo “Hello Php”; or ECHO ” Hi PHP” ; both statements are ok.

but $name; $NAME; $Name ; are different variables.

PHP scripts may be written number of types in a php page . But start and end should be proper.

Example of Multiple times php code in a page.

 <html>
 <body bgcolor="cyan">
 <center>
 HTML Content First Block
 <br>
 <?php
 echo " First block of PHP code";
 ?>
 <br>
 HTML content Second Block <br>
 <?php
 echo" Second block of PHP Code";
 ?>
 </center>
 </body>
 </html>

In above example there are two blocks of normal html and two php script block and output is as following.

HTML tag in PHP code

HTML tags may be embedded in php scripting code. Those tags are written in echo command as following example.

 <html>
 <body bgcolor="cyan">
 <center>
 HTML Content First Block
 <br>
 <?php
 echo "<b>  This block is bold because of <b> tag. </b>";
 ?>
</center>
</body>
</html>

Comment in PHP

In PHP commenting of the code is very simple. Single line comment is //

multiline comment is /* */ as in folllowing example and .(dot) is used to concatenate the values.

 <html>
 <body bgcolor="cyan">
 <center>
 HTML Content First Block
 <br>
 <?php
  echo" only this line is being printed";
  // echo" this line is not printed  commented as single line 
  /* mulitline comment
  these lines is out of executions
   because of the multiline comment
 --end here */
   $FirstName="Rahul"; 
   $LastName="Taneja";
   // We can concatenate those values as following.
  echo"<br>$FirstName" ." $LastName";
  ?>
  </center>
  </body>
  </html>

Output of the above program is shown in following image.

Python

Java

C

C++

HTML/CSS

Java Script

PHP

SQL

C Programs

PHP Syntax

Example of Multiple times php code in a page.

HTML tag in PHP code

Comment in PHP

Video/ C Introduction