PHP Basic Syntax
PHP Basic Syntax :
1. A
php programe contains html tags , plain text and php scripts.
2. A
php programe is same with extension of .php.
3. In
a php programe server side php scripts are written inside a php block.
4. A
php scripting block can be placed any where in the document and any number of
times.
5. A
standard php scripting block always starts with <?php and ends with ?> -
which is under standable for any web server that supports php.
<?php
-------------
-------------
?>
On web servers
with short hand support enabled , you can start a php scripting block with
<? And ends with ?> and also Asp style block <% and %>
<?
<%
---------------
------------------
--------------- ------------------
?>
%>
6. Short
hand open block and asp style block will be allowed by a web server only if it
is configured in php.ini.
7. Php.ini
is present in c:\xampp\php folder . open php.ini file and search for the value
of “short-open-tag” and “ asp-tags” to
identify whether the web server supports short open block (OR) asp block.
Echo() these are language constructs
Print()
# ---------- single line comment
$ ---------- variable
1. Echo
and print are the two language constructs or built-in function of php used for
outputting text or to give response back to client.
2. Differene
between echo and print : echo() is faster in execution than print(). Print() is
return an “integer” value where as
echo() will not return a value.
3. The
semicolon ( ; ) is a separator and is used to distinguish or separate one php
script from another.
Comments in PHP :
1. Single
line comments - // or #.
2. Block
comments start with /* and ends with */ .
0 comments:
Post a Comment