my first PHP scripts won't execute [solved]

Drone4four · July 4, 2006

The first PHP script I've written looks like this:[code]<!DOCTYPE html PUBLIC
"-//W3C//DTD XHTML 1.0 Strict//EN"
"http:www.w3.org/TR/xhtml/DTD/xhtml1-strict.dtd">
<html>
<head>
<title>Listing 4.1 Testing the tpe of varibable</title>
</head>
<body>
<div>
<?php
$testing; // declare without assigning
print gettype ($testing ); //NULL
print "<br />";
$testing = 5;
print gettype( $testing ); //integer
print "<br />";
$testing = "five";
print gettype( $testing ); // string
print "<br />";
$testing = 5.0
print gettype( $testing ); // double
print "<br />";
$testing = true;
print gettype( $testing ); // boolean
print "<br />";
?>
</div>
</body>[/code]When I try to execute it with my bash commandline, I get this error:[code]bash-3.00$ php firstPHPscript.php
PHP Parse error: syntax error, unexpected T_PRINT in /home/invert/programming/firstPHPscript.php on line 21[/code] Looking at line 21, I can't spot the mistake I've made. Can you?

.josh · July 4, 2006

$testing = 5.0

you forgot the ;

Drone4four · July 4, 2006

[quote author=Crayon Violent link=topic=99377.msg391321#msg391321 date=1151991695]
$testing = 5.0

you forgot the ;
[/quote]
Thanks Crayon for the quick response. WIth your correction, the script now executes with different errors:
[code]bash-3.00$ php firstPHPscript.php
<!DOCTYPE html PUBLIC
"-//W3C//DTD XHTML 1.0 Strict//EN"
"http:www.w3.org/TR/xhtml/DTD/xhtml1-strict.dtd">
<html>
<head>
<title>Listing 4.1 Testing the tpe of varibable</title>
</head>
<body>
<div>
PHP Notice: Undefined variable: testing in /home/invert/programming/firstPHPscript.php on line 11
PHP Notice: Undefined variable: testing in /home/invert/programming/firstPHPscript.php on line 12
NULL<br />integer<br />string<br />double<br />boolean<br /></div>
</body>[/code]And here is how my script renders in firefox:[code]"; $testing = 5; print gettype( $testing ); //integer print "
"; $testing = "five"; print gettype( $testing ); // string print "
"; $testing = 5.0; print gettype( $testing ); // double print "
"; $testing = true; print gettype( $testing ); // boolean print "
"; ?>[/code]
edit:sp
edit:added errors

Drone4four · July 4, 2006

I'm bumping this thread because I significantly edited my last post.

.josh · July 5, 2006

umm... are you running your script on your own computer? if so, then you have to install php in order to run php files on your computer.

Drone4four · July 6, 2006

Drone4four · July 11, 2006

My second script in PHP is a settype exercise. It looks like this:[code]<!DOCTYPE html PUBLIC
"-//W3C// DTD XHTML 1.0 Strict//EN"
"http://www.w3.org/TR/xhtml/DTD/xhtml1-strict.dtd">
<html>
<head>
<title>Listing 4.2 Changing the Type of a variable with settype()</title>
</head>
</html>
<body>
<div>
<?php
$undecided = 3.14;
print gettype( $undecided ); // double
print "-- $undecided<br />"; //3.14
settype( $undecided, string );
print gettype( $undecided ); // string
print "-- $undecided<br />"; //3.14
settype( $undecided, int );
print gettype( $undecided ); // integer
print " -- $undecided<br />"; // 3
settype( $undecided, double );
print gettype( $undecided<br />"; // double
print " -- $undecided<br />"; // 3.0
settype( $undecided, bool );
print gettype( $undecided ); //boolean
print " -- $undecided<br />; // 1
?>
,/div>
</body>
</html>[/code] That script produces this error:[code]bash-3.1$ php settypePHPExercise.php
PHP Parse error: syntax error, unexpected '>' in /home/invert/programming/settypePHPExercise.php on line 22
bash-3.1$ [/code] I can't figure out what's wrong with my line 22. Can you?

Dville · July 11, 2006

[code],/div>[/code]

should be

[code]</div>[/code]

kenrbnsn · July 11, 2006

Yes, the </div> tag is incorrect, but PHP shouldn't be complaining about it. What's really wrong is that you forgot the terminating double quote on this line:
[code]<?php print " -- $undecided<br />; // 1?>[/code]
It should be written:
[code]<?php print " -- $undecided<br />"; // 1?>[/code]

Ken

Drone4four · July 11, 2006

According to itrebal on freenode, “well $testing; doesn't declare the variable - you avhe to actually set it to something.” Further, “you cant output HTML with the variable like that.” I didn’t really know what itrebal was talking about so I asked him, “wtf?” itrebal recommended http://ca3.php.net/strings and http://us3.php.net/manual/en/language.types.string.php

I'll respond to the the posts made by kenrbnsn and Dville soon.

Drone4four · July 11, 2006

[quote author=kenrbnsn link=topic=99377.msg394900#msg394900 date=1152589782]
Yes, the </div> tag is incorrect, but PHP shouldn't be complaining about it. What's really wrong is that you forgot the terminating double quote on this line:
[code]<?php print " -- $undecided<br />; // 1?>[/code]
It should be written:
[code]<?php print " -- $undecided<br />"; // 1?>[/code][/quote]
[quote author=Dville link=topic=99377.msg394875#msg394875 date=1152585537]
[code],/div>[/code]

should be

[code]</div>[/code]Ken

[/quote]Thanks for the quick replies. But even with these two corrections, line 22 is still some how problematic.

bodenzord · July 11, 2006

This following line is incorrect:

[code]print gettype( $undecided<br />"; // double
[/code]

Change it to:

[code]print gettype( $undecided<br />); // double
[/code]

Notice that you have a quote at the end just before the semi-colon that is supposed to be a closing parenthesis.

Drone4four · July 11, 2006

Thanks bodenzord for the parenthesis correction. I'm still getting an error for line 22. Here is what my script looks like now: [code]<!DOCTYPE html PUBLIC
"-//W3C// DTD XHTML 1.0 Strict//EN"
"http://www.w3.org/TR/xhtml/DTD/xhtml1-strict.dtd">
<html>
<head>
<title>Listing 4.2 Changing the Type of a variable with settype()</title>
</head>
</html>
<body>
<div>
<?php
$undecided = 3.14;
print gettype( $undecided ); // double
print "-- $undecided<br />"; //3.14
settype( $undecided, string );
print gettype( $undecided ); // string
print "-- $undecided<br />"; //3.14
settype( $undecided, int );
print gettype( $undecided ); // integer
print " -- $undecided<br />"; // 3
settype( $undecided, double );
print gettype( $undecided<br />); // double
print " -- $undecided<br />"; // 3.0
settype( $undecided, bool );
print gettype( $undecided ); //boolean
print " -- $undecided<br />"; // 1
?>
</div>
</body>
</html>[/code]

bodenzord · July 11, 2006

Okay...the problem was that you had <br /> on line 22 that should not have been there. Check out the corrected code:

[code]<!DOCTYPE html PUBLIC
"-//W3C// DTD XHTML 1.0 Strict//EN"
"http://www.w3.org/TR/xhtml/DTD/xhtml1-strict.dtd">
<html>
<head>
<title>Listing 4.2 Changing the Type of a variable with settype()</title>
</head>
</html>
<body>
<div>
<?php
$undecided = 3.14;
print gettype( $undecided ); // double
print "-- $undecided<br />"; //3.14
settype( $undecided, string );
print gettype( $undecided ); // string
print "-- $undecided<br />"; //3.14
settype( $undecided, int );
print gettype( $undecided ); // integer
print " -- $undecided<br />"; // 3
settype( $undecided, double );
print gettype( $undecided); // double
print " -- $undecided<br />"; // 3.0
settype( $undecided, bool );
print gettype( $undecided ); //boolean
print " -- $undecided<br />"; // 1
?>
</div>
</body>
</html>[/code]

Drone4four · July 17, 2006

[quote author=bodenzord link=topic=99377.msg394950#msg394950 date=1152596732]
Okay...the problem was that you had <br /> on line 22 that should not have been there. Check out the corrected code:

[code]<!DOCTYPE html PUBLIC
"-//W3C// DTD XHTML 1.0 Strict//EN"
"http://www.w3.org/TR/xhtml/DTD/xhtml1-strict.dtd">
<html>
<head>
<title>Listing 4.2 Changing the Type of a variable with settype()</title>
</head>
</html>
<body>
<div>
<?php
$undecided = 3.14;
print gettype( $undecided ); // double
print "-- $undecided<br />"; //3.14
settype( $undecided, string );
print gettype( $undecided ); // string
print "-- $undecided<br />"; //3.14
settype( $undecided, int );
print gettype( $undecided ); // integer
print " -- $undecided<br />"; // 3
settype( $undecided, double );
print gettype( $undecided); // double
print " -- $undecided<br />"; // 3.0
settype( $undecided, bool );
print gettype( $undecided ); //boolean
print " -- $undecided<br />"; // 1
?>
</div>
</body>
</html>[/code]
[/quote]
Uhm, when I run bodenzord's modified script, I get this:

[code]bash-3.1$ php firstPHPscript-bodenzord.php
<!DOCTYPE html PUBLIC
"-//W3C// DTD XHTML 1.0 Strict//EN"
"http://www.w3.org/TR/xhtml/DTD/xhtml1-strict.dtd">
<html>
<head>
<title>Listing 4.2 Changing the Type of a variable with settype()</title>
</head>
</html>
<body>
<div>
double-- 3.14<br />PHP Notice: Use of undefined constant string - assumed 'string' in /home/invert/programming/PHP/firstPHPscript-bodenzord.php on line 15
string-- 3.14<br />PHP Notice: Use of undefined constant int - assumed 'int' in /home/invert/programming/PHP/firstPHPscript-bodenzord.php on line 18
integer -- 3<br />PHP Notice: Use of undefined constant double - assumed 'double' in /home/invert/programming/PHP/firstPHPscript-bodenzord.php on line 21
double -- 3<br />PHP Notice: Use of undefined constant bool - assumed 'bool' in /home/invert/programming/PHP/firstPHPscript-bodenzord.php on line 24
boolean -- 1<br /></div>
</body>
</html>bash-3.1$ [/code]What's going on here? What am I doing wrong?

edit:sp

True`Logic · July 17, 2006

[code]<?php
$testing; // declare without assigning
print gettype ($testing ); //NULL
print "<br />";
$testing = 5;
print gettype( $testing ); //integer
print "<br />";
$testing = "five";
print gettype( $testing ); // string
print "<br />";
$testing = 5.0
print gettype( $testing ); // double
print "<br />";
$testing = true;
print gettype( $testing ); // boolean
print "<br />";
?>[/code]

print sucks for one, use echo.. for 2, you forgot a semicolon, 3, all that unneeded whitespace adds to your filesize, get rid of it..

[code]
<?php
$testing = ""; // declare without assigning
echo gettype($testing); //NULL
echo "<br>";
$testing = 5;
echo gettype($testing); //integer
echo "<br>";
$testing = "five";
echo gettype($testing); // string
echo "<br>";
$testing = 5.0;
echo gettype($testing); // double
echo "<br>";
$testing = true;
echo gettype($testing); // boolean
echo "<br>";
/* returns:
string<br>integer<br>string<br>double<br>boolean<br>
*/
?>
[/code]

Drone4four · July 17, 2006

Thanks True`Logic, your version of my script executed perfectly .

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my first PHP scripts won't execute [solved]

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