No print or echo (nEwB)

luckydog · April 20, 2007

Just started with PHP but I am familiar with C++/C#.

When I run:

<HTML>

<HEAD>

<TITLE>FIRST PHP RUN</TITLE>

</HEAD>

<?php

echo("This was written out by PHP");

?>

</BODY>

</HTML>

through IE or Firefox I get the right background color but no echo, no "This was written out by PHP". Tried "print" also but none of that happening either.

If I run:

<?php

phpinfo();

?>

I get the PHP information page as expected.

I'm working through the book PHP Game Programming by Matt Rutledge. When I run one of the pages of code that came with it they work fine.

It's going to be hard to move on until I can get this resolved.

Any ideas?

Thanks

dustinnoe · April 20, 2007

<?php
echo "This was written out by PHP";
?>

print() uses parenthesis because it actually returns a value. echo returns nothing so no parenthesis.

Glyde · April 20, 2007

<?php
echo "This was written out by PHP";
?>
print() uses parenthesis because it actually returns a value. echo returns nothing.

Actually, that has nothing to do with why it uses parenthesis. Print and echo are language constructs, so are include, require, include_once, require_once, etc. They are not actually functions and therefore do not need parenthesis surrounding the "parameters," however it should work fine even if you do have them there. In his case, that's not what is causing the problem. Try, on a blank page:

<?php
$array = array('my', 'test', 'array');
print "<pre>", print_r($array, true), "</pre>";
?>

luckydog · April 20, 2007

Thanks Glyde-

In IE I still got a blank page.

In Firefox it printed, ", print_r($array, true), ""; ?>

taith · April 20, 2007

are you sure your a) using a php file, and b) your server supports php?

kenrbnsn · April 20, 2007

How are you invoking the script? Does the name of the script end with "php" or "html"? It should end with "php".

Ken

luckydog · April 20, 2007

How are you invoking the script? Does the name of the script end with "php" or "html"? It should end with "php".

From Notepad++ RUN->Launch in IE (or Firefox)

or from IE File->Open...

"are you sure your a) using a php file, and b) your server supports php?"

The file extension is .php. Apache has run other php scripts without a problem.

However, when I run this (from the CD that came with my book):

<HTML>
<HEAD>
	<TITLE>Processing All Form Elements</TITLE>
</HEAD>
<BODY BGCOLOR="#ffffff">
<FORM name="frm_Example" action="example04_02.php" method="post">
<table border="0" cellpadding="2" cellspacing="0">
<tr>
	<td align="left" valign="top"><b>Characters Name</b></td>
	<td align="left" valign="top"><input type="text" name="strCharacter"></td>
</tr>
<tr>
	<td align="left" valign="top"><b>Starting Amount of Gold</b></td>
	<td align="left" valign="top">
		<select name="dblGold">
			<option value="1000">1000</option>
			<option value="2000">2000</option>
			<option value="3000">3000</option>
		</select>
	</td>
</tr>
<tr>
	<td align="left" valign="top"><b>Starting Location</b></td>
	<td align="left" valign="top">
		<input type="radio" name="strLocation" value="mountains">Mountains
		<input type="radio" name="strLocation" value="plains" checked>Plains
		<input type="radio" name="strLocation" value="swamp">Swamp
	</td>
</tr>
<tr>
	<td align="left" valign="top"><b>Equipment</b></td>
	<td align="left" valign="top">
		<input type="checkbox" name="nEquipmentID[]" value="1" checked>Sword
		<input type="checkbox" name="nEquipmentID[]" value="2" checked>Chain Mail
		<input type="checkbox" name="nEquipmentID[]" value="2345" checked>Shield
		<input type="checkbox" name="nEquipmentID[]" value="4">Cross Bow
		<input type="checkbox" name="nEquipmentID[]" value="5">Arrows
	</td>
</tr>
<tr>
	<td align="left" valign="top" colspan="2"><input type="submit" value="Submit"></td>
</tr>
</table>
</FORM>
<?php
if($_POST)
{
$strCharacter = $_POST['strCharacter'];
$dblGold = $_POST['dblGold'];
$strLocation = $_POST['strLocation'];

echo("You Chose:<BR>$strCharacter<BR>$dblGold<BR>$strLocation<BR>");
$listvals = $_POST['nEquipmentID'];
for($i=0;$i<count($_POST['nEquipmentID']);$i++)
      echo "Equipment ID $i=".$listvals[$i]."<br>\n";
}
?>

</BODY>
</HTML>

Internet Explorer shows the form as expected but then prints:

$strCharacter

$dblGold

$strLocation

"); $listvals = $_POST['nEquipmentID']; for($i=0;$i\n"; } ?>

at the end.

Thanks for all the help.

kenrbnsn · April 20, 2007

That's your problem. PHP needs to be processed via the webserver. Do you have a local webserver running on your machine?

If you do, you must invoke it via http://localhost/path/to/your/script.php.

Next time you post code, please surround it with

tags.

I will edit you post to put those in.

Ken

luckydog · April 20, 2007

DOH! I knew that.

And 10-4 on the

 tags.

dustinnoe · April 20, 2007

<?php
echo "This was written out by PHP";
?>
print() uses parenthesis because it actually returns a value. echo returns nothing.
Actually, that has nothing to do with why it uses parenthesis. Print and echo are language constructs, so are include, require, include_once, require_once, etc. They are not actually functions and therefore do not need parenthesis surrounding the "parameters," however it should work fine even if you do have them there. In his case, that's not what is causing the problem. Try, on a blank page:
<?php
$array = array('my', 'test', 'array');
print "<pre>", print_r($array, true), "</pre>";
?>

print does act like a function in that it always returns a value. I don't know what I was thinking on the parenthesis though.

Glyde · April 21, 2007

<?php
echo "This was written out by PHP";
?>
print() uses parenthesis because it actually returns a value. echo returns nothing.
Actually, that has nothing to do with why it uses parenthesis. Print and echo are language constructs, so are include, require, include_once, require_once, etc. They are not actually functions and therefore do not need parenthesis surrounding the "parameters," however it should work fine even if you do have them there. In his case, that's not what is causing the problem. Try, on a blank page:
<?php
$array = array('my', 'test', 'array');
print "<pre>", print_r($array, true), "</pre>";
?>
print does act like a function in that it always returns a value. I don't know what I was thinking on the parenthesis though.

ACTS like a function, and can be used by one, but is not. Print, as stated, is still a language construct. But that's unimportant, please make the post as solved.

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No print or echo (nEwB)

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