login_with_img.rar_php 验证码

<?php class verifycode { public $Noisy = 5; public $Count = 4; public $Width = 60; public $Height = 18; public $Angle = 2; public $Offset = 20; public $Border = 1; public $imgData = ""; public $Graph = array( ); public $code = ""; public function vcode( $code ) { global $code; $this->code = $code; $i = 0; for ( ; $i < strlen( $code ); ++$i ) { $this->setdraw( substr( $code, $i, 1 ), $i ); } } public function setdot( $pX, $pY ) { if ( 0 <= $pX * ( $this->Width - $pX - 1 ) && 0 <= $pY * ( $this->Height - $pY - 1 ) ) { $this->Graph[$pX][$pY] = 1; } } public function rnd( ) { mt_srand( ( double )microtime( ) * 1000000 ); return mt_rand( 1, 999 ) / 1000; } public function sgn( $v ) { if ( 0 < $v ) { return 1; } if ( $v == 0 ) { return 0; } if ( $v < 0 ) { return -1; } } public function setdraw( $pIndex, $pNumber ) { $DotData[0] = array( 10, 1, 80, 1, 80, 100, 10, 100, 10, 1 ); $DotData[1] = array( 30, 15, 50, 1, 50, 100 ); $DotData[2] = array( 1, 34, 30, 1, 71, 1, 100, 34, 1, 100, 93, 100, 100, 86 ); $DotData[3] = array( 1, 1, 100, 1, 42, 42, 100, 70, 50, 100, 1, 70 ); $DotData[4] = array( 100, 73, 6, 73, 75, 6, 75, 100 ); $DotData[5] = array( 100, 1, 1, 1, 1, 50, 50, 35, 100, 55, 100, 80, 50, 100, 1, 95 ); $DotData[6] = array( 100, 20, 70, 1, 20, 1, 1, 30, 1, 80, 30, 100, 70, 100, 100, 80, 100, 60, 70, 50, 30, 50, 1, 60 ); $DotData[7] = array( 6, 26, 6, 6, 100, 6, 53, 100 ); $DotData[8] = array( 100, 30, 100, 20, 70, 1, 30, 1, 1, 20, 1, 30, 100, 70, 100, 80, 70, 100, 30, 100, 1, 80, 1, 70, 100, 30 ); $DotData[9] = array( 1, 80, 30, 100, 80, 100, 100, 70, 100, 20, 70, 1, 30, 1, 1, 20, 1, 40, 30, 50, 70, 50, 100, 40 ); $vExtent = $this->Width / strlen( $this->code ); $Margin[0] = $this->Border + $vExtent * $pNumber + $vExtent * ( $this->rnd( ) * $this->Offset ) / 100; $Margin[1] = $vExtent * ( $pNumber + 1 ) - $this->Border - $vExtent * ( $this->rnd( ) * $this->Offset ) / 100; $Margin[2] = $this->Border + $this->Height * ( $this->rnd( ) * $this->Offset ) / 100; $Margin[3] = $this->Height - $this->Border - $this->Height * ( $this->rnd( ) * $this->Offset ) / 100; $vWidth = intval( $Margin[1] - $Margin[0] ); $vHeight = intval( $Margin[3] - $Margin[2] ); $vStartX = intval( ( $DotData[$pIndex][0] - 1 ) * $vWidth / 100 ); $vStartY = intval( ( $DotData[$pIndex][1] - 1 ) * $vHeight / 100 ); $i = 1; for ( ; $i <= count( $DotData[$pIndex] ) / 2; ++$i ) { if ( $DotData[$pIndex][2 * $i - 2] != 0 && $DotData[$pIndex][2 * $i] != 0 ) { $vEndX = ( $DotData[$pIndex][2 * $i] - 1 ) * $vWidth / 100; $vEndY = ( $DotData[$pIndex][2 * $i + 1] - 1 ) * $vHeight / 100; $vDX = $vEndX - $vStartX; $vDY = $vEndY - $vStartY; if ( $vDX == 0 ) { $vAngle = $this->sgn( $vDY ) * 3.14 / 2; } else { $vAngle = atan( $vDY / $vDX ); } if ( sin( $vAngle ) == 0 ) { $vLength = $vDX; } else { $vLength = $vDY / sin( $vAngle ); } $vAngle += ( $this->rnd( ) - 0.5 ) * 2 * $this->Angle * 3.14 * 2 / 100; $vDX = intval( cos( $vAngle ) * $vLength ); $vDY = intval( sin( $vAngle ) * $vLength ); if ( abs( $vDY ) < abs( $vDX ) ) { $vDeltaT = abs( $vDX ); } else { $vDeltaT = abs( $vDY ); } $j = 1; for ( ; $j <= $vDeltaT; ++$j ) { $this->setdot( $Margin[0] + $vStartX + $j * $vDX / $vDeltaT, $Margin[2] + $vStartY + $j * $vDY / $vDeltaT ); } $vStartX += $vDX; $vStartY += $vDY; } } } public function output( ) { $out = ""; $out .= "GIF"; $out .= "89a"; $out .= chr( $this->Width % 256 ).chr( $this->Width / 256 % 256 ); $out .= chr( $this->Height % 256 ).chr( $this->Height / 256 % 256 ); $out .= chr( 128 ).chr( 0 ).chr( 0 ); $out .= chr( 238 ).chr( 238 ).chr( 238 ); $out .= chr( 0 ).chr( 0 ).chr( 0 ); $out .= ","; $out .= chr( 0 ).chr( 0 ).chr( 0 ).chr( 0 ); $out .= chr( $this->Width % 256 ).chr( $this->Width / 256 % 256 ); $out .= chr( $this->Height % 256 ).chr( $this->Height / 256 % 256 ); $out .= chr( 0 ).chr( 7 ).chr( 255 ); $y = 0; for ( ; $y < $this->Height; ++$y ) { $x = 0; for ( ; $x < $this->Width; ++$x ) { if ( $this->rnd( ) < $this->Noisy / 100 ) { $out .= chr( 1 - $this->Graph[$x][$y] ); } else if ( $x * ( $x - $this->Width ) == 0 || $y * ( $y - $this->Height ) == 0 ) { $out .= chr( $this->Graph[$x][$y] ); } else if ( $this->Graph[$x - 1][$y] == 1 || $this->Graph[$x][$y] || $this->Graph[$x][$y - 1] == 1 ) { $out .= chr( 1 ); } else { $out .= chr( 0 ); } if ( ( $y * $this->Width + $x + 1 ) % 126 == 0 ) { $out .= chr( 128 ); ++$i; } if ( ( $y * $this->Width + $x + $i + 1 ) % 255 == 0 ) { if ( 255 < $this->Width * $this->Height - $y * $this->Width - $x - 1 ) { $out .= chr( 255 ); } else { $out .= chr( $this->Width * $this->Height % 255 ); } } } } $out .= chr( 128 ).chr( 0 ).chr( 129 ).chr( 0 ).chr( 59 ); header( "Expires: -9999" ); header( "Pragma: no-cache" ); header( "cache-ctrol: no-cache" ); header( "ContentType: image/gif" ); echo $out; } } error_reporting( E_ERROR | E_WARNING | E_PARSE ); //$code = $_COOKIE['SYSIMG']; //$code="5678"; //echo "===" . $code . "==="; //$code = strrev( $code ) + 10 - 9; //$code = substr( $code, 0, 4 ); //echo "===" . $code . "===<br>"; $verify = new verifycode( ); $verify->vcode( $code ); $verify->output( ); ?>