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PHP - Can Anyone Tell Me What This Means?
It's not PHP, but if anyone could tell me what that means and how I can edit it I would be eternally grateful.
<Directory /var/www/vhosts/webaddress.co.uk/httpdocs> RMode config RUidGid (username) psacln </Directory> Similar TutorialsI came across usage of ^= in one the password hashing codes and am trying to find what this operator means in PHP. Can you please tell me what each of these lines of code means?
$allowedExts = array("gif", "jpeg", "jpg", "png");
$temp = explode(".", $_FILES["file"]["name"]);
$extension = strtolower( end($temp) );
$length = 20;
$newfilename = $_SESSION['user_id'].$_FILES["file"]["name"];
$thumbnail = $newfilename . "." . $extension;
move_uploaded_file($_FILES["file"]["tmp_name"], "upload/" . $thumbnail);
$sql = "INSERT INTO videos ( filename ) VALUES( $thumbnail )";
mysql_query($sql);
$file_location = '<a href="http://www.--.com/upload/' . $thumbnail . '">' . $thumbnail . '</a>';
$description = $description . " \n " . $newfilename;
Hello friends, in my database table or even php files i always find within the text something like this i love people\n i love world\n i love anything and sometimes \r and something \n\r so what does it mean is it like <br> or what ? thanks hi everyone
i keep seeing the following Comparison Operators:
<>i see it used in the following context:
if ($connection <> 'SSL')
{
$connection = 'NONSSL';
}
be grateful if somone would tell me what it means, i looked online but could not find the symbol
thanks
hello friends what does this type of array means ? $data[] = $row; What means this syntax line: $comments = (array) $comments thanks in advance Code: [Select] <?php class Point { public $x; public $y; } // Random values 0 - 1 function random_float ($min,$max) { return ($min+lcg_value()*(abs($max-$min))); } // Fuzzy C Means Algorithm function distributeOverMatrixU($num_of_clusters, $arr,$m) { global $MatrixCentroids; $num_of_data = sizeof($arr); $MatrixPointX = $arr; // Fill the $MatrixU table with random values from 0 to 1 for($j = 0; $j < $num_of_data; $j++) { $sum = 0; for($i = 0; $i < $num_of_clusters; $i++) { $MatrixU[$j][$i] = random_float(0,1); $sum += $MatrixU[$j][$i]; } // Normalize Data for($i = 0; $i < $num_of_clusters; $i++) { $MatrixU[$j][$i] = $MatrixU[$j][$i]/$sum; } } // repeat 200 for($a = 0; $a<200; $a++) { for($i = 0; $i < $num_of_clusters; $i++) { $tempAx = 0; $tempBx = 0; $tempAy = 0; $tempBy = 0; for($j = 0 ; $j < $num_of_data; $j++) { $tempAx = $tempAx + pow($MatrixU[$j][$i],$m); $tempBx += pow($MatrixU[$j][$i],$m) * $MatrixPointX[$j]->x; $tempAy = $tempAy + pow($MatrixU[$j][$i],$m); $tempBy += pow($MatrixU[$j][$i],$m) * $MatrixPointX[$j]->y; } $MatrixCentroids[$i] = new Point(); $MatrixCentroids[$i]->x = $tempBx / $tempAx; $MatrixCentroids[$i]->y = $tempBy / $tempAy; } // Cluster Centers for($j = 0 ; $j < $num_of_data; $j++) { $tempSum = 0; for($i = 0; $i < $num_of_clusters; $i++) { // Distance between 2 points $distance1 = pow(($MatrixPointX[$j]->x - $MatrixCentroids[$i]->x),2); $distance2 = pow(($MatrixPointX[$j]->y - $MatrixCentroids[$i]->y),2); $distance = $distance1 + $distance2; $distance = sqrt($distance); $MatrixU[$j][$i] = pow(1/$distance , 2/($m-1)); $tempSum += pow(1/$distance, 2/($m-1)); } for($i = 0; $i < $num_of_clusters; $i++) { $MatrixU[$j][$i] = ($MatrixU[$j][$i]/$tempSum); } $sum = 0; for($i = 0; $i < $num_of_clusters; $i++) { $sum += $MatrixU[$j][$i]; } // Norm Data for($i = 0; $i < $num_of_clusters; $i++) { $MatrixU[$j][$i] = $MatrixU[$j][$i]/$sum; } } } //print_r($MatrixCentroids); return $MatrixU ; } // Connect to DB $my_num = $_GET["cluster_number"]; $fuzz = $_GET["fuzz"]; require('db_connection.php'); $resultx=mysql_query("SELECT * FROM xdata"); $result=mysql_query("SELECT * FROM ydata"); // &#916;&#953;&#945;&#946;&#940;&#950;&#959;&#965;&#956;&#949; &#972;&#955;&#945; &#964;&#945; &#948;&#949;&#948;&#959;&#956;&#941;&#957;&#945; while ($a_row = mysql_fetch_array($result)) { for($j = 1 ; $j < 17; $j++) { $tmp_data[$j] = $a_row[ay.$j]; } } while ($x_row = mysql_fetch_array($resultx)) { for($j = 1; $j <17; $j++) { $p = new Point(); $p->x = $x_row[ax.$j]; $p->y = $tmp_data[$j]; $arr[] = $p; } } // Execute algorithm $data_in_clusters = distributeOverMatrixU($my_num, $arr,$fuzz); $size = sizeof($arr); $result=@mysql_query('select * from cluster0 limit 1', $link); if ($result) { echo "O &#960;&#943;&#957;&#945;&#954;&#945;&#962; &#965;&#960;&#940;&#961;&#967;&#949;&#953; &#954;&#945;&#953; &#960;&#961;&#941;&#960;&#949;&#953; &#957;&#945; &#948;&#953;&#945;&#947;&#961;&#945;&#966;&#959;&#973;&#957; &#959;&#953; &#960;&#961;&#959;&#951;&#947;&#959;&#973;&#956;&#949;&#957;&#949;&#962; &#949;&#947;&#947;&#961;&#945;&#966;&#941;&#962;...<BR>"; echo "&#916;&#953;&#945;&#947;&#961;&#945;&#966;&#942;...<BR>"; for($i = 0; $i <100; $i++) { $query="DROP TABLE cluster$i"; mysql_query($query,$link); } echo "H &#948;&#953;&#945;&#947;&#961;&#945;&#966;&#942; &#941;&#947;&#953;&#957;&#949; &#956;&#949; &#949;&#960;&#953;&#964;&#965;&#967;&#943;&#945;..."; } for($j = 0; $j < $my_num; $j++) { $query_c = "CREATE TABLE cluster$j(data_points_x FLOAT NOT NULL,data_points_y FLOAT NOT NULL)"; mysql_query($query_c,$link); } for($i = 0; $i < $size ; $i++) { $max = 0; $pos = 0; for($j = 0; $j < $my_num; $j++) { $tmp_point = $data_in_clusters[$i][$j]; if($tmp_point > $max) { $max = $tmp_point; $pos = $j; } } $xxxx = $arr[$i]->x; $yyyy = $arr[$i]->y; $query="INSERT INTO cluster$pos(data_points_x,data_points_y) values('$xxxx','$yyyy')";; mysql_query($query,$link); } echo "<br>"; echo "<img src='db_scatter.php' border=0 align=center width =600 height=400>"; // &#917;&#956;&#966;&#940;&#957;&#953;&#963;&#951; &#928;&#943;&#957;&#945;&#954;&#945; &#956;&#949; &#964;&#945; &#945;&#960;&#959;&#964;&#949;&#955;&#941;&#963;&#956;&#945;&#964;&#945; echo "<table width='500' border='2'>"; echo "<TR><TD><B>Points</B><BR></TD>"; for($i = 0; $i < $my_num; $i++){ $xxx = $MatrixCentroids[$i]->x; $yyy = $MatrixCentroids[$i]->y; echo "<TD>Cluster $i Centoid:<br><b>X:$xxx Y:$yyy</b></TD>"; } echo "</tr>"; for($i = 0; $i < $size ; $i++) { $x = $arr[$i]->x; $y = $arr[$i]->y; echo "<TR>"; echo "<TD><b>x:$x</b><br><b>y:$y</b></TD>"; for($j = 0; $j < $my_num; $j++) { $tmp_point = $data_in_clusters[$i][$j]; echo "<TD> $tmp_point</TD>"; } echo "</TR>"; } echo "</TABLE>"; ?> |
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