About Me
06 June 2009
If you have ever learnt PHP, then this blog can help you to remember the basic and syntaxes of PHP.
1. PHP Tag for scripting:
<?php
?>
2. Printing : two commands are available
echo "Hello World!!";
print "Hello World!!";
3. Simplest php file:
<html>
<body>
<?php
echo "Hello World!!";
?>
</body>
</html>
4. Be careful about semicolon (;) after each command.
5. 2 styles of comments
// this is a line comment
/* This is a
multiline comment
*/
6. Variable names starts with ‘$’ sign. Note: PHP is a loosely typed language.
$myStr = "This is my string";
7. String concatenation operator is dot (.), not plus (+)
$myText = "Your name is " . $yourName;
8. If… elseif… else statement:
if (condition)
code to be executed if condition is true;
elseif (condition)
code to be executed if condition is true;
else
code to be executed if condition is false;
9. switch statement:
switch (n)
{
case label1:
code to be executed if n=label1;
break;
case label2:
code to be executed if n=label2;
break;
default:
code to be executed if n is different from both label1 and label2;
}
10. Array:
$persons = array("Asim","Snigdha","Ashis");
$personAges = array("Asim"=>34, "Snigdha"=>30, "Ashis"=>26);
11. while loop:
while (condition)
{
code to be executed;
}
12. do-while loop:
do
{
code to be executed;
}
while (condition);
13. for loop:
for (init; condition; increment)
{
code to be executed;
}
14. foreach loop:
foreach ($array as $value)
{
code to be executed;
}
15. function:
function functionName()
{
code to be executed;
}
16. Form, $_POST
<html>
<body>
<form action="welcome.php" method="post">
Name: <input type="text" name="fname" />
Age: <input type="text" name="age" />
<input type="submit" />
</form>
</body>
</html>
welcome.php:
<html>
<body>
Welcome <?php echo $_POST["fname"]; ?>!<br />
You are <?php echo $_POST["age"]; ?> years old.
</body>
</html>
17. $_GET is used for form submission method = "get".
18. $_REQUEST contains the content of all of $_GET, $_POST, $_COOKIE
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