Download PHP
Download PHP for free here:http://www.php.net/downloads.php
Download MySQL for free here:http://www.mysql.com/downloads/
Download Apache for free here:http://httpd.apache.org/download.cgi
1. A PHP scripting block always starts with <?php or <? and end with ?> .All variables in PHP start with a $ sign symbol. A variable does not need to be declared before adding a value to it. PHP sentences end with semicolon;
PHP variable names are case sensitive, but the names of functions are case insensitive. MySQL is not case sensitive by default.
we use // to make a single-line comment or /* and */ to make a large comment block.
PHP array index starts at 0. Example of numeric array:
$cars=array("Saab","Volvo","BMW","Toyota");
$cars[0]="Saab";
Example of associative arrays:
$ages = array("Peter"=>32, "Quagmire"=>30, "Joe"=>34);
$ages['Peter'] = "32";
2. if else statement:
if (condition)
{code to be executed if condition is true;}
else
{code to be executed if condition is false;}
switch statement:
switch (n)
{
case label1:
code to be executed if n=label1;
break;
case label2:
code to be executed if n=label2;
break;
default:
code to be executed if n is different from both label1 and label2;
}
for loop
for (init; condition; increment)
{
code to be executed;
}
The foreach loop is used to loop through arrays.
foreach ($array as $value)
{
code to be executed;
}
example:
Download PHP for free here:http://www.php.net/downloads.php
Download MySQL for free here:http://www.mysql.com/downloads/
Download Apache for free here:http://httpd.apache.org/download.cgi
1. A PHP scripting block always starts with <?php or <? and end with ?> .All variables in PHP start with a $ sign symbol. A variable does not need to be declared before adding a value to it. PHP sentences end with semicolon;
PHP variable names are case sensitive, but the names of functions are case insensitive. MySQL is not case sensitive by default.
we use // to make a single-line comment or /* and */ to make a large comment block.
PHP array index starts at 0. Example of numeric array:
$cars=array("Saab","Volvo","BMW","Toyota");
$cars[0]="Saab";
Example of associative arrays:
$ages = array("Peter"=>32, "Quagmire"=>30, "Joe"=>34);
$ages['Peter'] = "32";
2. if else statement:
if (condition)
{code to be executed if condition is true;}
else
{code to be executed if condition is false;}
switch statement:
switch (n)
{
case label1:
code to be executed if n=label1;
break;
case label2:
code to be executed if n=label2;
break;
default:
code to be executed if n is different from both label1 and label2;
}
for loop
for (init; condition; increment)
{
code to be executed;
}
The foreach loop is used to loop through arrays.
foreach ($array as $value)
{
code to be executed;
}
example:
- Code:
<?$x=array("one","two","three");foreach ($x as $value){ echo $value . " "; }?>
function functionName()
{
code to be executed;
}
The $_GET Function
The built-in $_GET function is used to collect values from a form sent with
method="get".
The $_POST Function
The built-in $_POST function is used to collect values from a form sent with
method="post".
Example:
- Code:
<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:
- Code:
<html><body>Welcome<?php echo $_POST["fname"]; ?>!<br />You are <?php echo $_POST["age"]; ?> years old.</body></html>
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