How to delete a file by using PHP

Due to some reason I uploaded a plugin called “”, which is a light weight mp3 player, to the wordpress /uploads directory. Looks like my web server do not like the word mp3 anywhere in my file name (you have to pay to get around it). so even though I was able to upload it by a program, I can not just delete it by using a command in my FTP client. The only way I can remove this file is to use PHP unlink function.

$myFile = "";

Save this to a php file and upload it to the same directory that I want the file to be deleted. then run this php, I’m done. Apparently php uses similar syntax to the Unix C unlink() function. Everyone thinks there should be a delete command, even has a delete dummy entry only point to the unlink command.

PHP Tutorial -2 (Data type and array)

PHP tags
<?php ?>
Text Output
echo "something";
echo "something"; //$ in front, can not begin with a number, case sensitive
define("name", "value");
Format number
echo sprintf("%01.2f", 25); //25-->25.00
echo number_format(25000, 2); //25000-->25,000.00

Single-quoted Vs double-quoted strings
$age=12; $result1="age"; $result2='age'; //resut1:12 resutl2: $age
Joining string, or concatenation (dot . or .=). To get Hello World!
echo 'Hello'." ".'World';
Format a date ( August 10, 2006 –> 2006/08/10)
echo date("Y/m/d");
Array-Create. index starts with 0, use one of the following ways to create.
$pets = array("dragon", "unicorn", "tiger");
$pets[] ="dragon"; $pets[] ="unicorn"; $pets[] ="tiger";
$capitals =array("CA" => "Sacramento", "TX" => "Austin", "OR" => "Salem" );
unset ($pets[4]);
sort("pets"); //To sort an array that has numbers as keys and reassign keys
asort("pets"); //To sort an array that has strings as keys
Array-Getting Values.
list ($firstvar, $secondvar)=$pets;
//To get value from an array that has numbers as keys and put them in variables
//To copy all the values from an array into variables named from the corresponding keys. The sample from the book is wrong, since no key was assigned in $shirtInfo
current($arrayname) next($arrayname) previous($arrayname) end($arrayname) reset($arrayname);
//Manually iterate through an array
foreach($capitals as $state =>$city)
//walks through the array one value at a time.

PHP Tutorial -1

PHP & MySQL for Dummies

This is the book I am going to start with learning PHP. I am using MS SQL server at work, so MySQL part is not a problem. The basic PHP commands and functions will be listed along with my study progress.

Chapter 2: Connect to mysql

The provided mysql_up.php used mysqli_query function, which due to unknown reason does not work. MySQL revision at my website is 5.1.30 verified with mysql_get_server_info. But mysql_up-4.php works, it used mysql_query.

Check MySQL connection

/* Program: mysql_up.php
* Desc: Connects to MySQL Server and
* outputs settings.
echo "<html>
<head><title>Test MySQL</title></head>
$cxn = mysql_connect($host,$user,$password);
$result = mysql_query($sql);
if($result == false)
echo "<h4>Error: ".mysql_error($cxn)."</h4>";
/* Table that displays the results */
echo "<table border='1'>
for($i = 0; $i < mysql_num_rows($result); $i++)
echo "<tr>";
$row_array = mysql_fetch_row($result);
for($j = 0;$j < mysql_num_fields($result);$j++)
echo "<td>".$row_array[$j]."</td>n";
echo "</table>";

Check MySQL revision

$link = mysql_connect($host,$user,$password);if (!$link) {
die('Could not connect: ' . mysql_error());
printf("MySQL server version: %sn", mysql_get_server_info());