Programming Forums > Web Development and Design > PHP

Aphex_Twin · Mar 13th, 2005, 10:30 AM

I seem to have hit a snag with PHP, if anyone can lend a hand...

This is the code I used:

<HTML>
<HEAD>
<TITLE>TESTING PHP</TITLE>
</HEAD>
<BODY>
<?php
	$filename = 'test.txt';
	$myvalue=0;

	if (!$handle = fopen($filename, 'r')) 
	{ echo "Cannot open file $filename"; exit; }
	
	$myvalue = fscanf ($handle, "%d");
	$myvalue++;
   	
	fclose($handle);

	if (!$handle = fopen($filename, 'w')) 
	{ echo "Cannot open file $filename"; exit; }

	if (fprintf ($handle, "%d", $myvalue) === FALSE) 
	{ echo "Cannot write to file $filename"; exit; }
  
   	echo "Success, wrote $myvalue to file $filename";
  
   	fclose($handle);

?> 
</BODY>
</HTML>

What I want to do is open a file called "test.txt", read the value stored inside (an integer), increment the integer and store it back into the file. It's a kind of counter.

The above code gives the following error:

Fatal error: Call to undefined function: fprintf() in C:\Program Files\BadBlue\PE\files\test.php on line 21

But the functions printf, fwrite and fread are working and PHP is functional, part for this fprintf thing :eek:

tempest · Mar 13th, 2005, 2:23 PM

change:
[php] if (fprintf ($handle, "%d", $myvalue) === FALSE) [/php]

to:
[php] if (!fwrite($handle, $myvalue)) [/php]

tempest · Mar 13th, 2005, 2:25 PM

Personally, i think an easier alternative would be...

[php]
function incFile($file) {
$val = intval(readfile($file));
fopen($file, "w") or die("Could not open \"{$file}\"!");
fwrite($file, $val+1);
fclose($file);
}

incFile("test.txt");
[/php]

Aphex_Twin · Mar 14th, 2005, 12:27 PM

Thank you, your suggestions seem to work

Mar 13th, 2005, 10:30 AM	#1
Aphex_Twin Newbie Join Date: Mar 2005 Posts: 27 Rep Power: 0	I need some help with files I seem to have hit a snag with PHP, if anyone can lend a hand... This is the code I used: (Toggle Plain Text) <HTML> <HEAD> <TITLE>TESTING PHP</TITLE> </HEAD> <BODY> <?php $filename = 'test.txt'; $myvalue=0; if (!$handle = fopen($filename, 'r')) { echo "Cannot open file $filename"; exit; } $myvalue = fscanf ($handle, "%d"); $myvalue++; fclose($handle); if (!$handle = fopen($filename, 'w')) { echo "Cannot open file $filename"; exit; } if (fprintf ($handle, "%d", $myvalue) === FALSE) { echo "Cannot write to file $filename"; exit; } echo "Success, wrote $myvalue to file $filename"; fclose($handle); ?> </BODY> </HTML> <HTML> <HEAD> <TITLE>TESTING PHP</TITLE> </HEAD> <BODY> <?php $filename = 'test.txt'; $myvalue=0; if (!$handle = fopen($filename, 'r')) { echo "Cannot open file $filename"; exit; } $myvalue = fscanf ($handle, "%d"); $myvalue++; fclose($handle); if (!$handle = fopen($filename, 'w')) { echo "Cannot open file $filename"; exit; } if (fprintf ($handle, "%d", $myvalue) === FALSE) { echo "Cannot write to file $filename"; exit; } echo "Success, wrote $myvalue to file $filename"; fclose($handle); ?> </BODY> </HTML> What I want to do is open a file called "test.txt", read the value stored inside (an integer), increment the integer and store it back into the file. It's a kind of counter. The above code gives the following error: Fatal error: Call to undefined function: fprintf() in C:\Program Files\BadBlue\PE\files\test.php on line 21 But the functions printf, fwrite and fread are working and PHP is functional, part for this fprintf thing :eek:

Mar 13th, 2005, 2:23 PM	#2
tempest Programming Guru Join Date: Oct 2004 Posts: 1,041 Rep Power: 6	change: [php] if (fprintf ($handle, "%d", $myvalue) === FALSE) [/php] to: [php] if (!fwrite($handle, $myvalue)) [/php] __________________

Mar 13th, 2005, 2:25 PM	#3
tempest Programming Guru Join Date: Oct 2004 Posts: 1,041 Rep Power: 6	Personally, i think an easier alternative would be... [php] function incFile($file) { $val = intval(readfile($file)); fopen($file, "w") or die("Could not open \"{$file}\"!"); fwrite($file, $val+1); fclose($file); } incFile("test.txt"); [/php] __________________

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Mar 14th, 2005, 12:27 PM	#4
Aphex_Twin Newbie Join Date: Mar 2005 Posts: 27 Rep Power: 0	Thank you, your suggestions seem to work

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Programming Forums > Web Development and Design > PHP

I need some help with files