PHP For Loop

For example, add 1 to 100 up:

<?PHP
$sum = 0;
for ($ii=1; $ii<100; $ii++)
{
    $sum += $ii;
}
echo "$sum";
?>

Also, function foreach() can be used to iterate through an array:

<?PHP
$arr = array("Monday","Tuesday","Wednesday","Thursday","Friday","Saturday","Sunday");
foreach($arr as $d)
{
    echo "$d\n";
}
?>

For associative array:

<?PHP
$arr = array("one"=>"Monday","two"=>"Tuesday","three"=>"Wednesday",
"four"=>"Thursday","five"=>"Friday","six"=>"Saturday","seven"=>"Sunday");
foreach($arr as $num=>$d)
{
    echo "$num, $d\n";
}
?>

Use continue, break to skip a step or get out of the for loop.

<?PHP
for ($i=0;$i<10;$i++)
{
   if ($i % 3 == 0) continue;
   echo "$i, ";  //1, 2, 4, 5, 7, 8, 
}
for ($i=0;$i<10;$i++)
{
   if ($i == 4) break;
   echo "$i, ";  //0, 1, 2, 3, 
}
?>