For 2023 (and 2024 ...) - we are now fully retired from IT training. We have made many, many friends over 25 years of teaching about Python, Tcl, Perl, PHP, Lua, Java, C and C++ - and MySQL, Linux and Solaris/SunOS too. Our training notes are now very much out of date, but due to upward compatability most of our examples remain operational and even relevant ad you are welcome to make us if them "as seen" and at your own risk.
Lisa and I (Graham) now live in what was our training centre in Melksham - happy to meet with former delegates here - but do check ahead before coming round. We are far from inactive - rather, enjoying the times that we are retired but still healthy enough in mind and body to be active!
I am also active in many other area and still look after a lot of web sites - you can find an index ((here)) |
Most recent file in a directory - PHP
Want to report the most recently updated file in a directory in PHP? It's the sort of thing we all want to do, but in a variety of modified forms, quite often ... here's a code snippet to do it for you:
$dir = "/home/wellho/public_html/demo";
$pattern = '\.(html|php|php4)$';
$newstamp = 0;
$newname = "";
$dc = opendir($dir);
while ($fn = readdir($dc)) {
# Eliminate current directory, parent directory
if (ereg('^\.{1,2}$',$fn)) continue;
# Eliminate other pages not in pattern
if (! ereg($pattern,$fn)) continue;
$timedat = filemtime("$dir/$fn");
if ($timedat > $newstamp) {
$newstamp = $timedat;
$newname = $fn;
}
}
# $timedat is the time for the latest file
# $newname is the name of the latest file
You'll note that I have provided separate varaibles for the directory to be searched and a regular expression that's to be used for filtering file names - you'll always want to skip over . and .., and you'll normally want to ensure that backup files, hidden data, etc, don't get logged.
The code that uses $newname and $timedat later on needs to take care of the case in which they're null / empty - i.e. if you've looked through a directory that didn't contain anything.
The source code is available here in full, and you can run the script here. Note that the time / date report is the server time / date and not the time / date from the country you happen to be browsing in. (written 2006-12-18, updated 2006-12-21)
Associated topics are indexed as below, or enter http://melksh.am/nnnn for individual articles H109 - PHP - Input / Output [114] Relative or absolute milkman - (2004-11-10) [616] printf - a flawed but useful function - (2006-02-22) [653] Easy feed! - (2006-03-21) [709] Handling huge data files in PHP - (2006-05-04) [1094] PHP fread - truncated data - (2007-02-27) [1096] Sample script - FTP to get a file from within PHP - (2007-03-01) [1113] File and URL reading in PHP - (2007-03-20) [1442] Reading a file multiple times - file pointers - (2007-11-23) [1780] Server overloading - turns out to be feof in PHP - (2008-09-01) [2964] An introduction to file handling in programs - buffering, standard in and out, and file handles - (2010-09-21) [3029] PHP data sources - other web servers, large data flows, and the client (browser) - (2010-11-04) [3159] Returning multiple values from a function call in various languages - a comparison - (2011-02-06) [3424] Divide 10000 by 17. Do you get 588.235294117647, 588.24 or 588? - Ruby and PHP - (2011-09-08) [4483] Moving from mysql to mysqli - simple worked example - (2015-05-03)
Some other Articles
.pdf files - upload via PHP, store in MySQL, retrieveOne Thousand Posts and still going strongCascading and the busesThe year of the exploding projectorMost recent file in a directory - PHPSetting your colour theme through PHPRuby's case - no breakTraining on Cascading Style SheetsPositioning with Cascading Style SheetsEnthusiastic, but ....
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This is a page archived from The Horse's Mouth at
http://www.wellho.net/horse/ -
the diary and writings of Graham Ellis.
Every attempt was made to provide current information at the time the
page was written, but things do move forward in our business - new software
releases, price changes, new techniques. Please check back via
our main site for current courses,
prices, versions, etc - any mention of a price in "The Horse's Mouth"
cannot be taken as an offer to supply at that price.
Link to Ezine home page (for reading).
Link to Blogging home page (to add comments).
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