number in a file, auto. go up one

@Heavy_MetalMay 02.2006

Say I have the number “1” in a file, What command would I use to make that number go up to the next number?

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@pcthugMay 02.2006 — #Here is a basic example of such:

[code=php]
 <?php
 $file = 1;
 $increasenumber = ++$file;
 //$increasenumber will make $file(1) go up to the next number
 echo $increasenumber;
 ?>[/code]

@SpectreReturnsMay 02.2006 — #Do you want to record the new number too?

@Heavy_MetalauthorMay 02.2006 — #pcthug, it doesn't seem like that would make the number in the file change to the next number (I.E. 1 going to 2, 500 going to 501, no matter what the number is)

spectrereturns, i dont want to record the new number, i want to change the number in the file, from whatever it is to the next number, like auto_increamate in a DB

@Heavy_MetalauthorMay 03.2006 — #also can anyone tell me what this [code=php]$num = $read1 + $read2 + $read3 + $read4;[/code] is all about? I saw this variable in a code that i downloaded to look at and I dont understand why they added variables inside a variable and what that would do... can someone please explain?

@Heavy_MetalauthorMay 03.2006 — #noone?

@balloonbuffoonMay 03.2006 — #[code=php] $num = $read1 + $read2 + $read3 + $read4; [/code]This sets the variable $num to the sum of the values $read1, $read2, $read3, and $read4.

For your incrementing file thing, you could do the following:

[code=php]$filename = "count.txt";
 $org = file_get_contents($filename);
 $org++;
 file_put_contents($filename,$org);[/code]

You must have PHP 5, since it uses [I]file_put_contents[/I], but that can be switched out for more code that does the same thing and will work with earlier versions of PHP.

Good Luck,

--Steve

@NogDogMay 03.2006 — #For non-PHP5:

[code=php]
 <?php
 $file = "count.txt";
 $num = file_get_contents($file) or die ("Unable to read file.");
 $num = trim($num);
 $fh = fopen($file, 'w') or die("Unable to open file for writing");
 fwrite($fh, ++$num) or die("File write failed");
 fclose($fh);
 ?>
 [/code]

number in a file, auto. go up one

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