PHP Tutorial (Loopy Loops) Basics

[litewarez]

Heya all,

Here is a tutorial regarding Loops and i hope you can understand it, if you have any questions regarding this tutorial please post

<?php

/*
    Heres the php tutorial on LOOPS, there are several types of loops and each loop can pretty
    much acomplish the same outcome but theres some better than others so here are the types of
    loops.
|---
    Name: for loop
    Usage: Maily used for looping intergers
    Example:
    for(condition){
        
    }
|---
    Name: foreach loop
    Usage: Mainly used to loop threw array
    Example:
    foreach(array as variable){
        
    }
|---
    Name: while loop
    Usage: continue until condition is not true
    Example:
    while(condition){
    
    }
    
    Ok so in order ill show you some examples below
*/

/*------------------ForLoop------------------*/

    for ($i=0; $i < 10;$i++) {
        echo $i;
    }
//Output would be | 012345678910

    for ($i=10 $i > 0; $i--){
        echo $i;
    }
//Output would be | 109876543210

/*----------------ForeachLoop----------------*/
$simple_array = array(1,2,3,4,5,"Litewarez",7,8,9,10);
foreach($simple_array as $array_item){
    echo $array_item . "<br />"
}
//Output would be | 1<br />2<br />3<br />4<br />5<br />Litewarez<br />7<br />8<br />9<br />10<br />
$assoc_array = array(1 => "one",2 => "two",3 => "three",4 => "four",5 => "five",6 => "six",);
foreach($assoc_array as $assoc_name => $assoc_value){
    echo "INT:" . $assoc_name . " = " . $assoc_value . "<br />";
}
/*
    Html Output:
    
    INT: 1 = one
    INT: 2 = two
    INT: 3 = three
    INT: 4 = four
    INT: 5 = five
    INT: 6 = six
*/

/*----------------WhileLoop----------------*/

//While loops are most commenly used to loop threw a mysql 
//resource so that is the example ill show below.

//Usume Connected to MySql

$resource = mysql_query("SELECT int,word FROM numbers LIMIT 6");

while($row = mysql_fetch_assoc($resource)){
    echo "INT:" . $row['int'] . " = " . $row['word'] . "<br />";
}

/*
    Html Output:
    
    INT: 1 = one
    INT: 2 = two
    INT: 3 = three
    INT: 4 = four
    INT: 5 = five
    INT: 6 = six
*/

/*
    theres one more example that i want to show you where you take the contidtion
    and use a predefined constant such as true to make the loop never ending untill the
    break; 
*/

while (true){
    $row = mysql_fetch_assoc($resource); 
    if (!$row){
        break; // this will exit the while loop
    }
    echo "INT:" . $row['int'] . " = " . $row['word'] . "<br />";
}

?>

Also if you want to understand any aspects of php please just ask below and ill do my best to explain and show examples:?)

litewarez Reviewed by litewarez on 12th May 2009. PHP Tutorial (Loopy Loops) Basics Heya all, Here is a tutorial regarding Loops and i hope you can understand it, if you have any questions regarding this tutorial please post <?php /* Heres the php tutorial on LOOPS, there are several types of loops and each loop can pretty much acomplish the same outcome but theres some better than others so here are the types of Rating: 5