PHP TUTORIALS - PHP Loop Types

PHP Loop Types

Syntax


for (initialization; condition; increment)
{
  code to be executed;
}

Example


<html>
<body>
<?php
$a = 0;
$b = 0;

for( $i=0; $i<5; $i++ )
{
    $a += 10;
    $b += 5;
}
echo ("At the end of the loop a=$a and b=$b" );
?>
</body>
</html>

Syntax


while (condition)
{
    code to be executed;
}

Example


<html>
<body>
<?php
$i = 0;
$num = 50;

while( $i < 10)
{
   $num--;
   $i++;
}
echo ("Loop stopped at i = $i and num = $num" );
?>
</body>
</html>


Loop stopped at i = 10 and num = 40

Syntax


do
{
   code to be executed;
}while (condition);

Example


<html>
<body>
<?php
$i = 0;
$num = 0;
do
{
  $i++;
}while( $i < 10 );
echo ("Loop stopped at i = $i" );
?>
</body>
</html>


Loop stopped at i = 10

Syntax


foreach (array as value)
{
    code to be executed;

}

Example


<html>
<body>
<?php
$array = array( 1, 2, 3, 4, 5);
foreach( $array as $value )
{
  echo "Value is $value <br />";
}
?>
</body>
</html>


Value is 1
Value is 2
Value is 3
Value is 4
Value is 5

Example


<html>
<body>

<?php
$i = 0;

while( $i < 10)
{
   $i++;
   if( $i == 3 )break;
}
echo ("Loop stopped at i = $i" );
?>
</body>
</html>


Loop stopped at i = 3

Example


<html>
<body>
<?php
$array = array( 1, 2, 3, 4, 5);
foreach( $array as $value )
{
  if( $value == 3 )continue;
  echo "Value is $value <br />";
}
?>
</body>
</html>


Value is 1
Value is 2
Value is 4
Value is 5