用PHP实现登陆验证码(类似条行码状)

金光

  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=45 && $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;$xUPCAbarcode('12345678901');?> [img]

                               
登录/注册后可看大图

[/img]


转自：  http://edu.chinaz.com

金光

  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=45 && $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;$xUPCAbarcode('12345678901');?> [img]

                               
登录/注册后可看大图

[/img]


转自：  http://edu.chinaz.com