Get Data As An Array – Download PHP Example

Hiroshi — Sun, 22 Jun 2008 18:38:22 +0000

Array & Loop Example

Suppose we have a form and we want from user to select from a list of check boxes and check his favorite choices, post that data as an array and we want to display that data by calling array and arranging it in a loop. Then for this purpose consider following example.

Form Code

PHP Code – Retrieve Data From Array and Display It Through A Loop


for ($i=0; $i<count($_POST['pick']);$i++)
	{
$displaydata=$_POST['pick'][$i]."
";
echo "$displaydata";
        }
?>

In the above example we have collected the data from check boxes in form of arrays named as pick[] and we have sent it to another PHP page where it is displayed through a for loop.

PHP Arrays Example Download

Get Data As An Array – Download PHP Example is a post from: PHP Magic Book - Free PHP Scripts, Tutorials and Downloads

PHP For Loop

Hiroshi — Fri, 20 Jun 2008 19:46:11 +0000

For loop consists of three phases. i.e.

Define
Condition
Increment or decrement

First we define something. Then we apply a condition and then under that condition we increment or decrement that defined thing.

In complex way;
- The first part is an expression that is evaluated once when the loop begins.
- The second part is the condition. While the condition is true, the loop continues repeating. If the condition is false to start with, the following code block is not executed at all.
- The third part is an expression that is evaluated once at the end of each pass of the loop.

for ( initialize a counter;
       conditional statement;
       increment a counter)
{
	do this code;
}

Examples


for ($i = 1; $i <= 10; $i++)
{
    echo $i;
}
 
// Output of this script will be. 12345678910
 
// Explanation of above example:
// In this we define a var i and give it a value of 1.
// We tell the script to increment the value of i and print it.
// And keep incrementing it and printing it until it reaches to the value of 10.
// Or keep incrementing it and printing it if it is less then 10 or equal to 10.
 
// Caution:
// Now do not run a loop without a condition.
// Because it can go pretty mad without a condition.
// and go in cyclic chain process which will never end.
// and your PC or at least your PHP host will be held.
?>

Other Examples Of For Loop In PHP


for ($i = 1; $i <= 10; print $i, $i++);
 
// Output of this script will be. 12345678910
 
?>


$i = 1;
for (; ; )
{
    if ($i > 10)
   {
        break;
    }
    echo $i;
    $i++;
}
 
// Output of this script will be. 12345678910
 
?>


for ($i = 1; ; $i++)
   {
    if ($i > 10) {
        break;
    }
    echo $i;
}
 
// Output of this script will be. 12345678910
 
?>


for($num = 1; $num < 10; $num++)
{
if($num == 5)
continue;
echo "\n" . $num;
}
 
// Output of this script will be. 1 2 3 4 6 7 8 9
 
?>


for($num = 1; $num < 10; $num++)
{
if($num == 5)
break;
echo "\n" . $num;
}
 
// Output of this script will be. 1 2 3 4
 
?>

Using PHP for loop allows you to use much less code to do the same thing as with while and do.

PHP For Loop is a post from: PHP Magic Book - Free PHP Scripts, Tutorials and Downloads

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