This article mainly introduces relevant information about the detailed examples of php generating barcode pictures. I hope this article can help everyone. Friends in need can refer to
php generates barcode pictures. Detailed explanation of the example
Because of the user's needs, I wrote a barcode; used PHP to generate a barcode image. Everyone should be much better at this than me. Create a test file in the root directory of your project (directly Put the following code into it and run it to have a look. I also plagiarized it from others). In an actual project, you can encapsulate the following code into a function under a public class file and then call it.
class testinfo{ function UPCAbarcode($code) { $trans_code = $code; $lw = 2.2; $hi = 40; $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'; /* 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*75+30,$hi-3); // 95 $fg = ImageColorAllocate($img, 0, 0, 0); $bg = ImageColorAllocate($img, 255, 255, 255); ImageFilledRectangle($img, 0, 0, $lw*75+30, $hi+30, $bg); $shift=10; for ($x=0;$x<strlen($bars);$x++) { if (($x<0) || ($x>=45 && $x<46) || ($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*95-7,$hi,$code[11],$fg); /* Output the Header and Content. */ header("Content-Type: image/png"); ImagePNG($img); } //} echo UPCAbarcode('201212070099');
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