в 10:37, 26 мая 2010

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2010-05-26T07:04:34Z

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==Delete a file with the unlink() function.==



<source lang="html4strict">

Its syntax is: int unlink (string file)
<?
unlink("data.txt");
?>

</source>

==Deleting a file==



<source lang="html4strict">

<?php
$file = "/tmp/junk.txt";
unlink($file) or die ("can"t delete $file: $php_errormsg");
?>

</source>

==Deleting files==



<source lang="html4strict">

<?php
function delete( $file )
{
if( unlink( $file ) )
{
echo( "$file has been deleted<hr>" );
}
else
{
echo( "Unable to delete $file<hr>" );
}
}
?>
<html>
<head>
<title>Deleting files</title>
<head>
<body>
<?php
# for Linux use...
#$file_A = "/errlog_bak";
#$file_B = "/errlog_not";
# for Windows use...
$file_A = "C:\\errlog.bak";
$file_B = "C:\\errlog.not";
delete($file_A);
@delete($file_B);
?>
</body>
</html>

</source>

==Deleting Files with unlink( )==



<source lang="html4strict">

<?
$filename = "data.txt";
if (unlink($filename)) {
print "Deleted $filename!\n";
} else {
print "Delete of $filename failed!\n";
}
?>

</source>

==Moving a file across filesystems==



<source lang="html4strict">

<?php
if (copy("/tmp/code.c","/usr/local/src/code.c")) {
unlink("/tmp/code.c");
}
?>

</source>

==Using file_exists, touch, and unlink together==



<source lang="html4strict">

<?php
$file_name="test.txt";
if(file_exists($file_name)) {
echo ("$file_name does exist. ");
}
else {
echo ("The file $file_name does not exist. ");
touch($file_name);
}
if(file_exists($file_name)) {
echo ("The file $file_name does exist. ");
unlink($file_name);
}
else {
echo ("The file $file_name does not exist. ");
}
if(file_exists($file_name)) {
echo ("The file $file_name does exist. ");
}
else {
echo ("The file $file_name does not exist. ");
}
?>

</source>

==Using the unlink() Function==



<source lang="html4strict">

<?php
$files = glob("/tmp/*.tmp");
foreach($files as $val) {
unlink($val);
}
?>

</source>

==You can remove an existing file with the unlink() function.==



<source lang="html4strict">

<?
unlink("myfile.txt");
?>

</source>

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в 10:37, 26 мая 2010

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