my this code is not running, where is the error plz define

shinki garg · September 27th, 2010, 07:27 AM

< ?php
$radius = 4;
$diameter = $radius * 2;
$circumference = M_PI * $diameter;
$area = M_PI * pow( $radius, 2 );
echo âThis circle has... â;
echo âA radius of â . $radius . â â;
echo âA diameter of â . $diameter . â â;
echo âA circumference of â . $circumference . â â;
echo âAn area of â . $area . â â;
? >

m0y · October 2nd, 2010, 03:42 PM

Hi, I'm learning PHP too and have a little trouble with this but i figured it out

1.- You have to save it as a .php file, .html doesn't work. (just in case)

2.- I supose you remove the first space on the br tag, like this

Code:

<br / >

or you can use old br tags

Code:

<br>

3.- You can use both syntax like this:

Code:

echo "This circle has... <br>";

or

Code:

echo "A circumference of " . $circumference . " <br / > ";

both work the same, at least on this example

Hope this can help you some and lets continue learning!!

newheart42108 · December 25th, 2010, 09:35 PM

I realize this is an old thread, but there were several syntax errors:

1. extra space between within <?php (spaces not allowed)
2. extra space between < and br on each echo line
3. extra space between / and > on each echo line
4. "smart" or "curly" quotes (â and â). You must use straight quotes "
5. extra space between ? and >

correct code is

Code:

<?php
$radius = 4;
$diameter = $radius * 2;
$circumference = M_PI * $diameter;
$area = M_PI * pow( $radius, 2 );
echo "This circle has... <br /> ";
echo "A radius of " . $radius . " <br /> ";
echo "A diameter of " . $diameter . "<br /> ";
echo "A circumference of " . $circumference . " <br /> ";
echo "An area of " . $area . " <br /> ";
?>

--Doug