Using php to generate QR codes is very practical

We often see barcodes and QR codes, especially in the era of smartphones, these codes have become more active. Today I will share with you how to use php to generate barcodes. As for how to generate QR codes, the most commonly used method is to call Google's open code. api to generate, let’s get down to business and go directly to the code:

<?php 
function UPCAbarcode($code) { 
  $lw = 2; $hi = 100; 
  $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;; $center = &#39;01010&#39;; 
  /* UPC-A Must be 11 digits, we compute the checksum. */ 
  if ( strlen($code) != 11 ) { die("UPC-A Must be 11 digits."); } 
  /* Compute the EAN-13 Checksum digit */ 
  $ncode = &#39;0&#39;.$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*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] == &#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+17,$hi-5,$code[11],$fg); 
  /* Output the Header and Content. */ 
  header("Content-Type: image/png"); 
  ImagePNG($img); 
} 
?>