I found a strange bug/feature in MySQL which means that if you do a select statement using a INT against a VARCHAR column in matches all of the values in the column which do not start with a number. MySQL claim this is a normal.
The other day the new developer in my office wanted to get a directory listing using PHP as he was writting a new plugin for WordPress. To his surprise this is really easy with the glob() function:
<?php
foreach (glob("*") as $filename) {
echo $filename . 'size ' . filesize($filename) . 'n';
}
Glob allows you to use patterns similar to those when you are using the ls command in Terminal and returns the file list as an array.
Kayla Knight has written a great overview of the Model-View-Controller (MVC) Coding Structure over at OnExtraPixel. The article covers the basic idea behind the structure and how you could create your own bespoke MVC.
Quick tip: if you want to get the HTML for any web page you can use the PHP function file_get_contents(). To see the HTML in your web browser wrap the htmlentities function around the file_get_contents() function.
<?php
echo htmlentities(file_get_contents('http://example.com'));
Which returns:
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <title>IANA — Example domains</title> <!-- start common-head --> <meta http-equiv="Content-type" content="text/html; charset=utf-8" /> <link rel="stylesheet" type="text/css" href="/_css/2008.1/reset-fonts-grids.css" /> <link rel="stylesheet" type="text/css" media="screen" href="/_css/2008.1/screen.css" /> <link rel="stylesheet" type="text/css" media="print" href="/_css/2008.1/print.css" /> <link rel="shortcut icon" type="image/ico" href="/favicon.ico" /> <script type="text/javascript" src="/_js/prototype.js"></script> <script type="text/javascript" src="/_js/corners.js"></script> <script type="text/javascript" src="/_js/common.js"></script> <!-- end common-head --> </head> <body> <!-- start common-bodyhead --> .... <!-- end common-bodytail --> </body> </html>
This is my own opinion of the keys to give you a leg up when creating a new PHP/MySQL site:
With these tools you can get started on your next site in hours.
Today I needed to run a some code that did a lot of heavy lifting and kept having the error below:
Fatal error: Allowed memory size of 33554432 bytes exhausted (tried to allocate 71 bytes) in /Applications/MAMP/htdocs/test_memory.php on line 46
The solution is to override the memory limit set by PHP.ini:
<?php
ini_set('memory_limit','64M');
Check out PHP.Net’s ini_set documentation for more details.
Notes:
If you are looking for a fast way to URL shorten with CodeIgniter you are in luck.
Basically you set your routes (application->config->routes.php) $route[‘404_override’] to point to the controller and action which directs shorten URLs
e.g. in you routes file:
$route['404_override']='short_links/retrive';
Then short_links has a function retrive
<?php
if ( ! defined('BASEPATH')) exit('No direct script access allowed');
class Short_links extends CI_Controller {
function retrive()
{
$this->load->model('shorten_urls');//load the model which looks after the URLs
$url = $this->uri->segment(1);//get the URL segment e.g. abc
redirect($this->shorten_urls->get_url($url)); //lookup the original URL and redirect
}
}
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