Detailed tutorial on generating barcode images with php-PHP Tutorial-php.cn

Detailed tutorial on generating barcode images with php

巴扎黑

Release： 2023-03-16 07:52:01

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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; I 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(&#39;0001101&#39;,&#39;0011001&#39;,&#39;0010011&#39;,&#39;0111101&#39;,&#39;0100011&#39;,
        &#39;0110001&#39;,&#39;0101111&#39;,&#39;0111011&#39;,&#39;0110111&#39;,&#39;0001011&#39;);
    $Rencode = array(&#39;1110010&#39;,&#39;1100110&#39;,&#39;1101100&#39;,&#39;1000010&#39;,&#39;1011100&#39;,
        &#39;1001110&#39;,&#39;1010000&#39;,&#39;1000100&#39;,&#39;1001000&#39;,&#39;1110100&#39;);
    $ends = &#39;101&#39;; $center = &#39;01010&#39;;
    /* Compute the EAN-13 Checksum digit */
    $ncode = &#39;0&#39;.$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] == &#39;1&#39;) {
        $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(&#39;201212070099&#39;);

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