Linux, Apache, MySQL, PHP

< ?
mysql_connect("DBSERVER", "DBUSERNAME", "DBPASSWORD");
mysql_select_db("DBNAME");
?>

$con = mysql_connect("localhost","peter","abc123");
if (!$con)
{
die('Could not connect: ' . mysql_error());
}
// some code
mysql_close($con);
?>

<?php

function UPCAbarcode($code) {
  $lw = 2; $hi = 100;
  $Lencode = array('0001101','0011001','0010011','0111101','0100011',
                   '0110001','0101111','0111011','0110111','0001011');
  $Rencode = array('1110010','1100110','1101100','1000010','1011100',
                   '1001110','1010000','1000100','1001000','1110100');
  $ends = '101'; $center = '01010';
  /* UPC-A Must be 11 digits, we compute the checksum. */
  if ( strlen($code) != 11 ) { die("UPC-A Must be 11 digits."); }
  /* Compute the EAN-13 Checksum digit */
  $ncode = '0'.$code;
  $even = 0; $odd = 0;
  for ($x=0;$x<12;$x++) {
    if ($x % 2) { $odd += $ncode[$x]; } else { $even += $ncode[$x]; }
  }
  $code.=(10 - (($odd * 3 + $even) % 10)) % 10;
  /* Create the bar encoding using a binary string */
  $bars=$ends;
  $bars.=$Lencode[$code[0]];
  for($x=1;$x<6;$x++) {
    $bars.=$Lencode[$code[$x]];
  }
  $bars.=$center;
  for($x=6;$x<12;$x++) {
    $bars.=$Rencode[$code[$x]];
  }
  $bars.=$ends;
  /* Generate the Barcode Image */
  $img = ImageCreate($lw*95+30,$hi+30);
  $fg = ImageColorAllocate($img, 0, 0, 0);
  $bg = ImageColorAllocate($img, 255, 255, 255);
  ImageFilledRectangle($img, 0, 0, $lw*95+30, $hi+30, $bg);
  $shift=10;
  for ($x=0;$x<strlen($bars);$x++) {
    if (($x<10) || ($x>=45 && $x<50) || ($x >=85)) { $sh=10; } else { $sh=0; }
    if ($bars[$x] == '1') { $color = $fg; } else { $color = $bg; }
    ImageFilledRectangle($img, ($x*$lw)+15,5,($x+1)*$lw+14,$hi+5+$sh,$color);
  }
  /* Add the Human Readable Label */
  ImageString($img,4,5,$hi-5,$code[0],$fg);
  for ($x=0;$x<5;$x++) {
    ImageString($img,5,$lw*(13+$x*6)+15,$hi+5,$code[$x+1],$fg);
    ImageString($img,5,$lw*(53+$x*6)+15,$hi+5,$code[$x+6],$fg);
  }
  ImageString($img,4,$lw*95+17,$hi-5,$code[11],$fg);
  /* Output the Header and Content. */
  header("Content-Type: image/png");
  ImagePNG($img);
}

UPCAbarcode('12345678901');

?>

$checksum = $checksum + 32;
$checksum2 = chr($checksum);
$key = array_search($checksum2,$b_chr,true);
$bcstring.=$b_enc[$key].$stop.$term_bar;

if($bcstring[$i]==0 && $bcstring[$i]!=$last_char || $i == $bc_cnt-1)
{
	// stopping new bar
	// bool imagefilledrectangle  ( resource $image  , int $x1  , int $y1  , int $x2  , int $y2  , int $color  )
	imagefilledrectangle($im, $start_x, $pad_top, $start_x+($stop_x*$size)-1, $height, $black);
	$stop_x = 1;
}

<?php
	/*
		This is a program to generate a code 128B barcode and returns an image.
		
		Chris J, 2009-11-04
	*/
	
	
	$string=urldecode($_GET['string']);
	$size=urldecode($_GET['size']);
	$height=urldecode($_GET['height']);
	
	// $string is string to convert to bar code
		
	// $size is the pixel width of the bar code and is used as a base unit for each barcode/space
	// based on the # of 0's or 1's in a row.
	// for example the stop bar code hash is 11000111010. This is drawn as a bar 2 units wide, a space 3 units wide, a bar 
	// 3 units wide, a space 1 unit wide, a bar 1 unit wide followed by a space 1 unit wide. If the size is equal to 3 (for 3 pixels)
	//	this will mean the barcode for the stop is bar 6 pixels, space 9 pixels, bar 9 pixels, space 3 pixels, bar 3 pixels and space
	// 3 pixels. The entire code will messure 33 pixels in width. of course that is just for the stop (the end of the code 128 barcode).
	
	// $height is the height of the barcode in pixels. There must be room for for some padding on the top and bottom and room for
	// the text of $string to be printed just under the barcode.
	
	// at the front and back of a code 128 barcode is a blank space called the quiet zone. It should be 10 times the unit ($size in my function)
	include('hash_code_128.php');
	$bcstring = '';
	$cnt = strlen($string) ;
	
	$quiet_zone 	= 10*$size-1;
	$pad_top 			= 5;
	$pad_text 		= 3;
	$font_size 		= 5;
	$pad_bottom 	= 5;
	$font_left 		= $quiet_zone;
	$font_top 		= $pad_text + $height; 
	$ttl_width		= ($quiet_zone*2)+($size*($cnt+3)*11)+2; // include string length + start + stop + checksum + front and back quiet zones
	$ttl_height		= $pad_top + $pad_text + $font_size + $pad_bottom + $height; 
	
  
  
  
	$running_checksum = 104; // START B hardcoded...
	$bcstring.=$b_enc['104'];
	// build the barcode
	for($i=0;$i<$cnt;$i++)
	{
		$position = $i+1;
		$key = array_search($string[$i],$b_chr,true);
		$bcstring.=$b_enc[$key];
		$running_checksum+=($position*$key);
	}
	$checksum = $running_checksum%103;
	//~ $bcstring.=$b_enc[$checksum].$stop.$term_bar;
  
  $checksum = $checksum + 32;
  $checksum2 = chr($checksum);
  $key = array_search($checksum2,$b_chr,true);
  $bcstring.=$b_enc[$key].$stop.$term_bar;


 
	header ('Content-type: image/png');
	$im = @imagecreatetruecolor($ttl_width, $ttl_height) or die('Cannot Initialize new GD image stream');
	$white = imagecolorallocate($im, 255, 255, 255);
	$black = imagecolorallocate($im, 0, 0, 0);
	
	imagefill($im, 0, 0, $white);
	
	$start_x = 0;
	$stop_x = 1;
	$last_char = '0';
	$bc_cnt = strlen($bcstring);
	
	for($i=0;$i<$bc_cnt;$i++)	{
		if($bcstring[$i]==1 && $bcstring[$i]!=$last_char)		{
			// starting new bar
			$start_x = $quiet_zone+($i*$size);
		}
		if($bcstring[$i]==1 && $bcstring[$i]==$last_char)		{
			// continuing new bar
			$stop_x++;
		}
		if($bcstring[$i]==0 && $bcstring[$i]!=$last_char)		{
			// stopping new bar
			// bool imagefilledrectangle  ( resource $image  , int $x1  , int $y1  , int $x2  , int $y2  , int $color  )
			imagefilledrectangle($im, $start_x, $pad_top, $start_x+($stop_x*$size)-1, $height, $black);
			$stop_x = 1;
		}
    //pezzo aggiunto
		$last_char = $bcstring[$i];
    if($bcstring[$i]==0 && $bcstring[$i]!=$last_char || $i == $bc_cnt-1){
      // stopping new bar
      // bool imagefilledrectangle  ( resource $image  , int $x1  , int $y1  , int $x2  , int $y2  , int $color  )
      imagefilledrectangle($im, $start_x, $pad_top, $start_x+($stop_x*$size)-1, $height, $black);
      $stop_x = 1;
    }
	}
	// bool imagestring  ( resource $image  , int $font  , int $x  , int $y  , string $string  , int $color  )
	//imagestring($im, 3, $font_left, $font_top, $bcstring, $black);
	imagestring($im, 3, $font_left, $font_top, "", $black);
	imagepng($im);
	imagedestroy($im);
?>

<?php
	/*
		This is a program to generate a code 128B barcode and returns an image.
		
		Chris J, 2009-11-04
	*/
	function gen_code128($string, $fid, $size = 1, $height = 50, $show_text = true)
	{
	
		// $string is string to convert to bar code
		
		// $fid is the filename, it will default to the $string if no is provided
		
		// $size is the pixel width of the bar code and is used as a base unit for each barcode/space
		// based on the # of 0's or 1's in a row.
		// for example the stop bar code hash is 11000111010. This is drawn as a bar 2 units wide, a space 3 units wide, a bar 
		// 3 units wide, a space 1 unit wide, a bar 1 unit wide followed by a space 1 unit wide. If the size is equal to 3 (for 3 pixels)
		//	this will mean the barcode for the stop is bar 6 pixels, space 9 pixels, bar 9 pixels, space 3 pixels, bar 3 pixels and space
		// 3 pixels. The entire code will messure 33 pixels in width. of course that is just for the stop (the end of the code 128 barcode).
		
		// $height is the height of the barcode in pixels. There must be room for for some padding on the top and bottom and room for
		// the text of $string to be printed just under the barcode.
		
		// at the front and back of a code 128 barcode is a blank space called the quiet zone. It should be 10 times the unit ($size in my function)
		
		// the $show_text parameter determines if a string will display under the barcode, this string will be the text version of the barcode.
		
		include('hash_code_128.php');
		$bcstring = '';
		$cnt = strlen($string) ;
		
		$quiet_zone 	= 10*$size-1;
		$pad_top 			= 5;
		$pad_bottom 	= 5;
		$ttl_width		= ($quiet_zone*2)+($size*($cnt+3)*11)+2; // include string length + start + stop + checksum + front and back quiet zones
		
		if($show_text)
		{
			$pad_text 		= 3;
			$font_size 		= 5;
			$font_left 		= $quiet_zone;
			$font_top 		= $pad_text + $height; 
			$ttl_height		= $pad_top + $pad_text + $font_size + $pad_bottom + $height;
		}
		else
		{
			$ttl_height		= $pad_top + $pad_bottom + $height; 
		}
		$running_checksum = 104; // START B hardcoded...
		$bcstring.=$b_enc['104'];
		// build the barcode
		for($i=0;$i<$cnt;$i++)
		{
			$position = $i+1;
			$key = array_search($string[$i],$b_chr,true);
			$bcstring.=$b_enc[$key];
			$running_checksum+=($position*$key);
			//	echo "<p>pos: ".$position."<br>char: ".$string[$i]."<br>key: ".$key."<br>bcstring: ".$bcstring."<br>run checksum: ".$running_checksum."</p>";
		}
		
		$checksum = $running_checksum%103;
		/*
			Important!!!!
			--------------
			if the checksum is over 94 just send the raw value down to make the key.
			if it is under 95 add 32 and grab the ascii character to lookup the key of the hash array for that character.
		*/
		if($checksum<95)
		{
			$checksum = $checksum + 32;
			$checksum2 = chr($checksum);
			$key = array_search($checksum2,$b_chr,true);
		}
		else
		{
			$key = $checksum;
		}
		//echo "<p>key: ".$key."<br></p>";
		$bcstring.=$b_enc[$key].$stop.$term_bar;
		
		// header ('Content-type: image/jpeg'); <-- only need when send the image back to the browser directly.
		// we will be saving the image, via the string sent.
		$im = @imagecreatetruecolor($ttl_width, $ttl_height) or die('Cannot Initialize new GD image stream');
		$white = imagecolorallocate($im, 255, 255, 255);
		$black = imagecolorallocate($im, 0, 0, 0);
		
		imagefill($im, 0, 0, $white);
		
		$current_pos = $quiet_zone;
		$start_x = 0;
		$stop_x = 1;
		$last_char = '0';
		
		$bc_cnt = strlen($bcstring);
		for($i=0;$i<$bc_cnt;$i++)
		{
			if($bcstring[$i]==1 && $bcstring[$i]!=$last_char)
			{
				// starting new bar
				$start_x = $quiet_zone+($i*$size);
			}
			if($bcstring[$i]==1 && $bcstring[$i]==$last_char)
			{
				// continuing new bar
				$stop_x++;
			}
			if($bcstring[$i]==0 && $bcstring[$i]!=$last_char || $i == $bc_cnt-1)
			{
				// stopping new bar
				// bool imagefilledrectangle( resource $image  , int $x1  , int $y1  , int $x2  , int $y2  , int $color  )
				imagefilledrectangle($im, $start_x, $pad_top, $start_x+($stop_x*$size)-1, $height, $black);
				$stop_x = 1;
			}
			$last_char = $bcstring[$i];
		}
		// bool imagestring( resource $image  , int $font  , int $x  , int $y  , string $string  , int $color  )
		$filename = '';
		if($show_text)
		{
			imagestring($im, 3, $font_left, $font_top, $string, $black);
		}
		//echo $_SERVER['SERVER_NAME']."\n";
		if($_SERVER['SERVER_NAME']=='localhost')
		{
			$filename = $fid.".jpg";
		}
		else
		{
			$filename = "/var/www/barcodes/".$fid.".jpg";
		}
		imagejpeg($im, $filename);
		imagedestroy($im);
		
		return $filename;
	}
?>