53 lines
1.5 KiB
PHP
53 lines
1.5 KiB
PHP
<?php
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/*
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A very primitive captcha implementation
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*/
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/* Create Imagick object */
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$Imagick = new Imagick();
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/* Create the ImagickPixel object (used to set the background color on image) */
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$bg = new ImagickPixel();
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/* Set the pixel color to white */
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$bg->setColor( 'white' );
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/* Create a drawing object and set the font size */
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$ImagickDraw = new ImagickDraw();
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/* Set font and font size. You can also specify /path/to/font.ttf */
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$ImagickDraw->setFont( 'Helvetica Regular' );
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$ImagickDraw->setFontSize( 20 );
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/* Create the text */
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$alphanum = 'ABXZRMHTL23456789';
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$string = substr( str_shuffle( $alphanum ), 2, 6 );
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/* Create new empty image */
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$Imagick->newImage( 85, 30, $bg );
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/* Write the text on the image */
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$Imagick->annotateImage( $ImagickDraw, 4, 20, 0, $string );
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/* Add some swirl */
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$Imagick->swirlImage( 20 );
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/* Create a few random lines */
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$ImagickDraw->line( rand( 0, 70 ), rand( 0, 30 ), rand( 0, 70 ), rand( 0, 30 ) );
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$ImagickDraw->line( rand( 0, 70 ), rand( 0, 30 ), rand( 0, 70 ), rand( 0, 30 ) );
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$ImagickDraw->line( rand( 0, 70 ), rand( 0, 30 ), rand( 0, 70 ), rand( 0, 30 ) );
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$ImagickDraw->line( rand( 0, 70 ), rand( 0, 30 ), rand( 0, 70 ), rand( 0, 30 ) );
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$ImagickDraw->line( rand( 0, 70 ), rand( 0, 30 ), rand( 0, 70 ), rand( 0, 30 ) );
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/* Draw the ImagickDraw object contents to the image. */
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$Imagick->drawImage( $ImagickDraw );
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/* Give the image a format */
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$Imagick->setImageFormat( 'png' );
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/* Send headers and output the image */
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header( "Content-Type: image/{$Imagick->getImageFormat()}" );
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echo $Imagick->getImageBlob( );
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?>
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