ch-4 variable in php

Variable in php

Unlike C, php does not need data type before declare variable name. In php we can directly declare and define variable name.

For example:

<?php

$a=10;

$b=20;

$c=$a+$b;

echo $c;

?>

Output:30

If you want to write string along with this output, So you can try below code

<?php

$a=10;

$b=20;

$c=$a+$b;

echo "answer is  $c";

?>

Output:

answer is  30

see above third output statement which enclosed within double quotes ("answer is  $c";) .

here, in place of  double quotes if you use single quotes like (‘answer is  $c’;) it will print  (answer is  $c).

for ex.

<?php

$a=10;

$b=20;

$c=$a+$b;

echo ‘answer is  $c’;

?>

Output:

answer is  $c

You can also store one variable value In another variable , and this process simply called variable variables.

<?php

$name="Gita Devi";

$$name=$name;

echo $$name;

$$$name=$$name;

echo $$$name;

?>

 Output:

Gita DeviGita Devi