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MyDigitalpoint · (This post was last modified: 08-15-2011, 12:02 PM by MyDigitalpoint.)

Based on my own experience, snippets are a great way to learn PHP and sometimes a useful time-saver even if you know it because you can refer to these chunks of code for a quick integration into your coding.

Let's post small snippets that can be useful to other members whether to learn or add extra functionality to a website or blog, in example, WordPress using the PHP executable plugin.

The following snippet it's a directory listing so people can browse a directory on your site and even download files when you have setup a restriction via htaccess that does not allow directory listing:
[/quote]

Code:
<?php

$sd = '.';

$dir = opendir($sd);

echo '<table cellspacing="2" cellpadding="2">

<tr><td><b>Directory Name</b></td><td><b>Dir Type</b></td><td><b>Last Modified</b></td></td>';

while($item = readdir($dir)){

if( (is_dir($item)) && (substr($item, 0, 1) !='.') ){

$dt = filetype($item);

$lm = date('F j, Y', filemtime($item));

echo '<tr><td><a href="./'.$item.'">'.$item.'</a></td><td>'.$dt.'</td><td>'.$lm.'</td></tr>';

}

}

echo '</table><hr />';

rewinddir($dir);

echo '<table cellspacing="2" cellpadding="2">

<tr><td><b>File Name</b></td><td><b>File Type</b></td><td><b>Size</b></td><td><b>Last Mod.</b></td></tr>';

while($item = readdir($dir)){

if( (is_file($item)) && (substr($item, 0, 1) !='.') ){

$dt = filetype($item);

$lm = date('F j, Y', filemtime($item));

$fs = filesize($item);

echo '<tr><td><a href="./'.$item.'">'.$item.'</a></td><td>'.$dt.'</td><td>'.$fs.' bytes</td><td>'.$lm.'</td></tr>';

}

}

echo '</table>';

closedir($dir);

?>

**HiddenKnowledge** · 10-02-2011, 11:35 PM,

This snippet is supposed to connect you to a mysql server and database using the basic mysql functions.

PHP Code:
<?php 
$config['mysqluser'] = "USERNAME";
$config['mysqlpass'] = "PASSWORD";
$config['mysqldatabase'] = "DATABASE";
$config['mysqlhost'] = "HOST";

mysql_connect($config['mysqlhost'],$config['mysqluser'],$config['mysqlpass']) or die(mysql_error());
mysql_select_db($config['mysqldatabase']) or die(mysql_error()); 

MyDigitalpoint · 10-20-2011, 08:24 AM,

This snippet generates random hexadecimal number to get HTML colors

PHP Code:
<?php 
function get_random_color() 
{ 
    for ($i = 0; $i<6; $i++) 
    { 
        $color .=  dechex(rand(0,15)); 
    } 
    return "$color"; 
} 
?>

This can be useful to randomize the background color of a website page or a section, such as the header or navigation bars this way:

PHP Code:
<div style="background:#<?php echo $color; ?>;">

or <body background="#<?php echo $color; ?>;"> 

**Zach** · 10-20-2011, 09:37 AM,

Here's one of the ones I find extremely useful when parsing user input. It's a regex function that takes all non-numeric characters out of a string. [source]

PHP Code:
preg_replace('/\D/', '', $string) 

Of course, you can replace the D with other regex strings, like [a-zA-Z] to remove all non alphabetic characters, or [a-zA-Z0-9] to remove all alphanumeric characters.

Arthur · (This post was last modified: 10-27-2011, 09:02 PM by Arthur.)

When I saw this thread, I thought "Oh! I'll post my hex color code generator!", but obviously that would be pointless, as there already is one. So I'll post my snippet to delete all files in a directory (useful if you want to have a temp folder and it gets full of non-deleted useless files.)

PHP Code:
function empty_folder($folder){
    $files = glob("$folder/*");
    for ($i = 0; $i < count($files); $i++){
        unlink($files[$i]);
    }
} 

Function to highlight a string where $str is the string to be highlighted, $bg is whether it's the background or the text that's highlighted, and $color is what color to highlight it:

PHP Code:
function highlight($str, $bg=true, $color=false){
    $type = "";
    if (!$color){
        $color = "#8B8B00";
    }
    if ($bg){
        $type = "background-";
    }
    return "<span style='".$type."color:$color;'>".$str."</span>";
} 

**Zach** · 10-27-2011, 02:42 PM,

@Arthur: You might have some trouble with your first function. empty() is a pre-defined function in PHP.

Arthur · 10-27-2011, 09:01 PM,

Oops. I posted a modified version of the function. The version I actually use is called delete_temp(). So I'll change the function name in my previous post.
Thanks for noticing!

Serial Thrilla · (This post was last modified: 01-18-2012, 02:33 AM by Serial Thrilla.)

Some *nix / Linux batch script for HLDS Valve gaming servers.

Half-Life Dedicated Server (HLDS):

Code:
#!/bin/bash

# Starting

export LD_LIBRARY_PATH=$LD_LIBRARY_PATH

while true; do

./hlds_i686 -console -game x -ip x -port x +maxplayers x +map x -pingboost 3

done

Replace the "x" with your value and add other parameters if need.
_______________________________________________________

Source Dedicated Server (SRCDS):

Code:
#!/bin/bash

# Starting

while true; do

./srcds_run -console -game x -ip x -port x +maxplayers x +map x

done

Replace the "x" with your value and add other parameters if need.
_______________________________________________________

Create a empty file and paste this code, modify it, so it looks how you need it and save the file into the root folder of your server (where srcds_run or hlds_i686 is).

Source: http://forum.singularity.us.to/thread-96.html (Yes, I'm the person called Technician)

Arthur · (This post was last modified: 04-12-2012, 07:29 AM by Arthur.)

PHP function to add a JavaScript alert ($id allows you to give it an identifier so you know which it is [perhaps a later version will allow auto-numbering]):

PHP Code:
function alert_flag($id=false){
    if ($id){
        $flag = ' Flag: '.$id;
    }
    echo '<script type="text/javascript">alert("Is this active?'.$flag.'");</script>';
} 