help with substr

fberardi

Hello;
I have a script the reads a directory of mp3s and creates a list of sorted, clickable links. I want to modify it to make is SKIP the first 9 characters when it prints the name ot the links in the list. I do a sort on the first 9 characters so the full name must be in the URL link. Just want to change what SHOWS when it "prints" the list!

I am not very good at coding, so anyone who can help me, I sure would appreciate it!!!

Here is an EXAMPLE of the filename:
"20090222_S2_The Perfect Investment (5 of 7).mp3"

I want it to list the filename as "The Perfect Investment (5 of 7).mp3" when it creates the list. I think it is THIS line - //echo "<a href='$path/$file'>$file</a><br/>";

HERE is the script code NOW:

<?
$path = "mp3/2009/";
$narray=array();
$dir_handle = @opendir($path) or die("Unable to open $path");
$i=0;
while($file = readdir($dir_handle))
{
if(is_dir($file))
{
continue;
}
else if($file != '.' && $file != '..')
{
//echo "<a href='$path/$file'>$file</a><br/>";
$narray[$i]=$file;
$i++;
}
}
rsort($narray);

for($i=0; $i<sizeof($narray); $i++)
{
echo "<a href=".chr(34).$path.$narray[$i].chr(34).">".$narray[$i]."</a><br/>";

}

//closing the directory
closedir($dir_handle);
?>
<h1 style="text-decoration: underline;">2008 Sermons</h1><?
$path = "mp3/2008/";
$narray=array();
$dir_handle = @opendir($path) or die("Unable to open $path");
$i=0;
while($file = readdir($dir_handle))
{
if(is_dir($file))
{
continue;
}
else if($file != '.' && $file != '..')
{
//echo "<a href='$path/$file'>$file</a><br/>";
$narray[$i]=$file;
$i++;
}
}
rsort($narray);

for($i=0; $i<sizeof($narray); $i++)
{
echo "<a href=".chr(34).$path.$narray[$i].chr(34).">".$narray[$i]."</a><br/>";

}

//closing the directory
closedir($dir_handle);
?>

Salkcin

Just to make some things clear...

You have a file named like this:

20090222_S2_The Perfect Investment (5 of 7).mp3

Now you want to remove the 9 first chars from the filename, which would make the file look like this:

S2_The Perfect Investment (5 of 7).mp3

then, later in your question you say you want it to look like this:

The Perfect Investment (5 of 7).mp3

Exactly how do you want the filename to appear?
Do all the files look like this:

xxxxxxxxx_xx_the filename.mp3

fberardi

Sorry for the confusion.
all files start with a 10 digit string that I want to remove.

Some look like:
xxxxxxxxx_xx_the filename.mp3

and some look like:
xxxxxxxxx_the filename.mp3

So I am trying to eliminate the first 10 digits just for the description that prints in the URL link list. The underlying URL link (a href) itself must still contain the first 10 digits. Hope that is clear what I mean.

Thank you for your reply

Salkcin

alright, well, you could use regular expressions to remove the unwanted chars, like this: (Note: I optimized your code a bit)

<?php

// path to the folder with the mp3's
$path = 'path/to/dir/';

// Loop thru $path and list all mp3 files
foreach(glob($path . '*.mp3') as $mp3)
{
	// Remove the unwanted chars
	$fname = preg_replace('/^\d+_([a-z0-9]{2}_)?/i', '', basename($mp3));

// Present the link with the edited filename
echo '<a href="' . $mp3 . '">' . $fname . '</a><br />';
}

?>

fberardi

I need to do a reverse sort, so newest files are on top!:

Salkcin

Well, in your first code, you used rsort() which sorts the Array() in a reversed alphabetical order. That wont guarantee that the newest file will be first in the list as you want. In order to make sure the file-list is sorted in a "newest-file-first" order, you need to check and compare when the file was last changed (created) by checking the actual time in the file.

Sorry for my bad english, here's un updated example of my snippet:

<?php


// Function called by usort() to sort the provided array
function newest($a, $b)
{
	// Check when the file was last changed (created)
	return (filectime($a) > filectime($b)) ? -1 : 1;
}




// Path to the dir with the files...
$path = 'path/to/dir/';


// Load all mp3's into an array
$dir = glob($path . '*.mp3');


// Sort the array with the most recent mp3 first using a comparison-function
uasort($dir, "newest");


// Loop thru the $dir array...
foreach($dir as $mp3)
{
	// Remove the unwanted chars
	$fname = preg_replace('/^\d+_([a-z0-9]{2}_)?/i', '', basename($mp3));

// Present the link with the edited filename
echo '<a href="' . $mp3 . '">' . $fname . '</a><br />';
}


?>

fberardi

Sorry, I meant that I wanted reverse alpha sort (not file created or newest). I am reading the code and hope sometime to understand it. Thanks for all the replies. It is reverse alpha I want. Can you help?

Salkcin

sure,

<?php


// Path to the dir with the files...
$path = 'path/to/dir/';


// Load all mp3's into an array
$dir = glob($path . '*.mp3');


// Sort the array in a reversed alphabetical order
rsort($dir);


// Loop thru the $dir array...
foreach($dir as $mp3)
{
    // Remove the unwanted chars
    $fname = preg_replace('/^\d+_([a-z0-9]{2}_)?/i', '', basename($mp3));

// Present the link with the edited filename
echo '<a href="' . $mp3 . '">' . $fname . '</a><br />';
}


?>