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programming languages tutorials

foreach statement in php

Posted: 31 Dec 2012 01:28 AM PST

foreach Statement:

 The foreach statement is used to loop through arrays.
For every loop, the value of the current array element is assigned to $value (and the array pointer is moved by one) so on the next loop, you'll be looking at the next element.
Syntax
foreach (array as value)
{
code to be executed;
}

Example
<html>
<body>
<?php
$arr=array("one", "two", "three");
foreach ($arr as $value)
{
echo "Value: " . $value . "
";
}
?>
</body>
</html>

Output;

one
two 
three

for Statement in php

Posted: 31 Dec 2012 01:19 AM PST

for Statement
The for statement is used when you know how many times you want to execute a statement or a list of statements.
Syntax
for (initialization; condition; increment)
{
code to be executed;
}

Note:
The for statement has three parameters. The first parameter initializes variables, the second parameter holds the condition, and the third parameter contains the increments required to implement the loop. If more than one variable is included in the initialization or the increment parameter, they should be separated by commas. The condition must evaluate to true or false.
Example

<html>
<body>
<?php
for ($i=1; $i<=5; $i++)
 {
 echo "Hello World!";
}
?>

≤html>
Output
Hello World
Hello World
Hello World
Hello World
Hello World

do...while Statement in php

Posted: 31 Dec 2012 01:14 AM PST

The do...while Statement
The do...while statement will execute a block of code at least once - it then will repeat the loop as long as a condition is true.
Syntax

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



Example
The following example will increment the value of i at least once, and it will continue incrementing
the variable i as long as it has a value of less than 5:



<html>
<body>
<?php
$i=0;
do
{
$i++;
echo "The number is " . $i . " ";
}
while ($i<5)
</body>
</html>


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