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PHP Do While Loop
Do while loop in PHP
The do...while Loop executes the statement once and then check the condition.
Syntax
do
{
code to be executed;
}
while (condition);
Eg
<?php
$i=1;
do
{
echo "The number is " . $i . "<br>";
$i++;
}
while ($i<=5);
?>
The number is 1
The number is 2
The number is 3
The number is 4
The number is 5
In the above example,
variable $i hold value="1". first execute the statement inside do.
after that it check while condition($i<=5).
So the given statements execute 5 times.
Write a program to display table of given number.
<?php
@$tab=$_GET['tab'];
$i=1;
do
{
$t=$tab*$i;
echo $t." ";
$i++;
}
while ($i<=10);
?>
<body>
<form>
Enter Your table<input type="text" name="tab"><br/>
<input type="submit" value="Table">
</form>
</body>
Output
10 20 30 40 50 60 70 80 90 100
Enter your table
In the above example,
Create text-box and a button using HTML script. Logic is performed inside PHP script.
First we collect the value entered by user using $_GET. $i hold value=1.
to print the table of 10. ($t=$tab*$i) this condition multiply the entered value with $x(initial value) value is increment after every iteration.
While check ($i<=10). so the while( ) loop executes the statement 10 times.
Output will generate table of 10.
Nested do - while
Write a program to display more than one table at a time.
<?php
$n=1;
$i=0;
$t=0;
do
{
do
{
$i++;
$t=$i*$n;
echo $t;
while($i<=10)
}
$i=0;
$n++;
while ($n<=10);
}
?>
In the above example,
we display more than one table, nested do while loop is used.
Declare three variable $n hold vale="1"
$i hold value="0"
$t hold value="0"