diskfreespace
Do not forget, if you are going to read the contents of the file which you have already written via fwrite() or else you have to close the file first.
fclose
(PHP 4, PHP 5)
fclose — Closes an open file pointer
Description
bool fclose
( resource $handle
)
The file pointed to by handle is closed.
Parameters
- handle
-
The file pointer must be valid, and must point to a file successfully opened by fopen() or fsockopen().
Return Values
Returns TRUE on success or FALSE on failure.
Examples
Example #1 A simple fclose() example
<?php
$handle = fopen('somefile.txt', 'r');
fclose($handle);
?>
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User Contributed Notesfclose
sineld at sineld dot com
23-Nov-2006 12:50
23-Nov-2006 12:50
mark at markvange * com
05-May-2006 05:17
05-May-2006 05:17
It is very important to make sure you clear any incoming packets out of the incoming buffer using fread() or some equivalent. Although you can call fclose() the socket does not actually shut down until the inbound packets have been cleared. This can lead to some confusion.
williamhamby at williamhamby dot net
08-Apr-2006 02:19
08-Apr-2006 02:19
Trying to understand how 'end foreach' and 'endwhile' differ, I've encountered a problem I can't solve by myself. The following is a fairly easy stock portfolio script. Everything works, except at the end where I want to calculate the average of the gains as represented by $gain[$i].
<?php
$quantity="3";
$stocks=array("iso","grn","bdgr.pk");
$buydates=array("3 jan 2006","1 feb 2006","3 apr 2006");
$prices=array("0.32","0.20","0.95");
$recommends=array("hold","strong buy","buy");
$i=0;
echo"<tr>";
echo "\n<th align='center'>ticker</th>";
echo "\n<th align='center'>buy date</th>";
echo "\n<th align='center'>price $</th>";
echo "\n<th align='center'>recommend</th>";
echo "\n<th align='center'>value $</th>";
echo "\n<th align='center'>change %</th>\n</tr>\n";
foreach($stocks as $stock) {
$fp=fopen("http://","r");
$data=fgetcsv($fp,1000,",");
$values=$data[1];
echo "<tr>\n<td align='center'>".$stock."</td>";
echo "\n<td align='center'>".$buydates[$i]."</td>";
echo "\n<td align='center'>".$prices[$i]."</td>";
echo "\n<td align='center'>".$recommends[$i]."</td>";
echo "\n<td align='center'>".$values."</td>\n<td align='center'>";
echo $gain[$i]=round(((($values-$prices[$i])/$prices[$i])*100),2);
echo "</td>\n</tr>";
fclose ($fp);
$i++;
}
echo "\n<tr>\n<td align='center'>".$gain[$i]."<td>\n</tr>\n";
?>
Help?
James R. Steel
28-Nov-2005 05:02
28-Nov-2005 05:02
In response to kumar mcmillan 'gotcha' note below, we get a different result on a W2K machine:
<?php
$file_pointer = fopen('textfile.dat', 'r');
fclose($file_pointer);
echo '$file_pointer is resource = ' . (is_resource($file_pointer) ? 'true': 'false');
?>
output:
$file_pointer is resource = false
kit dot lester at lycos dot co dot uk
18-Sep-2005 01:34
18-Sep-2005 01:34
fclose() also clears any locks on the file, so if another process was being kept waiting for the lock to be cleared, fclose()ing will allow the other process to continue.
[Another "just-in-case" reason to habitually fclose() all files as soon as practical!]
jricher at jacquesricher dot com
01-Feb-2005 02:06
01-Feb-2005 02:06
It is a GOOD_THING to check the return value from fclose(), as some operating systems only flush file output on close, and can, therefore, return an error from fclose(). You can catch severe data-eating errors by doing this.
I learned this the hard way.
kumar mcmillan
30-Sep-2004 08:10
30-Sep-2004 08:10
gotcha:
<?php
$file_pointer = fopen('data.dat', 'r');
fclose($file_pointer);
echo '$file_pointer is resource = ' . (is_resource($file_pointer) ? 'true': 'false');
?>
output:
$file_pointer is resource = true
daniel7 dot martinez at ps dot ge dot com
11-Sep-2001 12:06
11-Sep-2001 12:06
Generally, it's always a good idea to close a file when you're done with it. It's very easy for something to go wrong and corrupt a file that hasn't been closed properly. If you're concerned about efficiency, the overhead is negligible.