3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php /** * View any string as a hexdump. * * This is most commonly used to view binary data from streams * or sockets while debugging, but can be used to view any string * with non-viewable characters. * * @version 1.3.2 * @author Aidan Lister <aidan@php.net> * @author Peter Waller <iridum@php.net> * @link http://aidanlister.com/2004/04/viewing-binary-data-as-a-hexdump-in-php/ * @param string $data The string to be dumped * @param bool $htmloutput Set to false for non-HTML output * @param bool $uppercase Set to true for uppercase hex * @param bool $return Set to true to return the dump */ function hexdump ($data, $htmloutput = false, $uppercase = false, $return = true) { // Init $hexi = ''; $ascii = ''; $dump = ($htmloutput === true) ? '<pre>' : ''; $offset = 0; $len = strlen($data); // Upper or lower case hexadecimal $x = ($uppercase === false) ? 'x' : 'X'; // Iterate string for ($i = $j = 0; $i < $len; $i++) { // Convert to hexidecimal $hexi .= sprintf("%02$x ", ord($data[$i])); // Replace non-viewable bytes with '.' if (ord($data[$i]) >= 32) { $ascii .= ($htmloutput === true) ? htmlentities($data[$i]) : $data[$i]; } else { $ascii .= '.'; } // Add extra column spacing if ($j === 7) { $hexi .= ' '; $ascii .= ' '; } // Add row if (++$j === 16 || $i === $len - 1) { // Join the hexi / ascii output $dump .= sprintf("%04$x %-49s %s", $offset, $hexi, $ascii); // Reset vars $hexi = $ascii = ''; $offset += 16; $j = 0; // Add newline if ($i !== $len - 1) { $dump .= "\n"; } } } // Finish dump $dump .= $htmloutput === true ? '</pre>' : ''; $dump .= "\n"; // Output method if ($return === false) { echo $dump; } else { return $dump; } } $row=array_fill(0,256*4,'U'); $mem_map=array_fill(0,100,$row); $output=""; $mypic=imagecreate(100,100); $mycolor=imagecolorallocate($mypic,4,5,6); $mycolor2=imagecolorallocate($mypic,0x111,0x111,0x111); imagefill($mypic,0,0,$mycolor2); $pic_map=array_fill(0,100,$mypic); for ($x=0;$x<256*60;$x++){ //Each x is 1 index $cur_row=(int)($x/256); $offset=($x%256)*4; //if($offset!=0)die("offset not zero"); //print "True color image[b4] =" . (imageistruecolor($mypic)) ."\n"; //$mypic2=imagerotate($mypic,30,256*13 + $x); //$mypic2=imagerotate($pic_map[$cur_row],30,$x); $mypic2=imagerotate($mypic,30, $x); // Byte @ 0 $mem_map[$cur_row+2][$offset]=imagecolorat($mypic2,0,0)&0xFF; //echo "Row[$cur_row]-byte0\n"; //byte @ pos 1 if ($mem_map[$cur_row+1][$offset]!=='U'){ $Green=$mem_map[$cur_row+1][$offset]; $byte=(imagecolorat($mypic2,0,0)&0xFF00)>>8; if($Green > $byte) $byte=$byte|0x100; $mem_map[$cur_row+2][$offset+1]=($byte-$Green); //echo "Row[$cur_row]-byte1\n"; } else{ //echo "!=Row[$cur_row][$offset]=" . $mem_map[$cur_row+1][$offset]."\n"; } //Byte @ POS 2 if(($mem_map[$cur_row+1][$offset+1]!=='U')&&($mem_map[$cur_row][$offset]!=='U')){ $Green=$mem_map[$cur_row+1][$offset+1]; $Red=$mem_map[$cur_row][$offset]; //if($cur_row==20){ echo "ROW20: RED=$Red , Green=$Green Byte=$byte"}; $byte=(imagecolorat($mypic2,0,0)>>16) &0xFF; //if($cur_row==39){ echo "ROW20: RED=$Red , Green=$Green Byte=$byte \n";} if($Green > $byte) $byte=$byte|0x100; $byte=$byte-$Green; if($Red > $byte) $byte=$byte|0x100; $byte=$byte-$Red; $OF_Flag=(($mem_map[$cur_row+1][$offset] + $mem_map[$cur_row+2][$offset+1])>0xff)?1:0; $mem_map[$cur_row+2][$offset+2]=$byte - $OF_Flag; //echo "Row[$cur_row]-byte2\n"; //var_dump($mem_map); //die("post2die row=$cur_row"); // if($cur_row==39){echo "Row20:FinalBye=$byte\n";} //hexdump(chr($mem_map[$cur_row+2][$offset]).chr($mem_map[$cur_row+2][$offset+1]).chr($mem_map[$cur_row+2][$offset+2])); } //Byte @ POS 3 if(($mem_map[$cur_row+1][$offset+2]!=='U')&&($mem_map[$cur_row][$offset+1]!=='U')){ $Green=$mem_map[$cur_row+1][$offset+2]; $Red=$mem_map[$cur_row][$offset+1]; $byte=(imagecolorat($mypic2,0,0)&0xFF000000)>>24; if($Green > $byte) $byte=$byte|0x100; $byte=$byte-$Green; if($Red > $byte) $byte=$byte|0x100; $byte=$byte-$Red; $OF_Flag=(($mem_map[$cur_row][$offset] + $mem_map[$cur_row+1][$offset+1] + $mem_map[$cur_row+2][$offset+2])>>8)&0xFF; $mem_map[$cur_row+2][$offset+3]=$byte -$OF_Flag; //print "Current row = $cur_row\nCurrent offset =$offset"; //hexdump(chr($mem_map[$cur_row+2][$offset]).chr($mem_map[$cur_row+2][$offset+1]).chr($mem_map[$cur_row+2][$offset+2]).chr($mem_map[$cur_row+2][$offset+3])); } //var_dump(imagecolorat($mypic,0,0)); //echo "color @ 50,50 :" . dechex(imagecolorat($mypic,50,50)) . "\n"; //var_dump(imagecolorat($mypic,99,99)); imagedestroy($mypic); $mypic=imagecreate(100,100); imagefill($mypic,0,0,$mycolor2); } echo "done!\n"; //var_dump($mem_map); $output=""; foreach($mem_map as $row){ foreach($row as $byte){ $output.=chr($byte); } } for($count=0;$count<strlen($output);$count++){ if ($count%4 !=3) continue; $byte=ord($output[$count]); $Alpha=ord($output[$count+4156-3]); if($Alpha >$byte)$byte=$byte|0x100; $output[$count]=chr($byte-$Alpha); } echo hexdump($output); //file_put_contents("gdHex.dump",hexdump($output)); //var_dump(1);
Output for 7.0.0 - 7.2.0
Fatal error: Uncaught Error: Call to undefined function imagecreate() in /in/9LbR8:87 Stack trace: #0 {main} thrown in /in/9LbR8 on line 87
Process exited with code 255.
Output for 5.5.0 - 5.6.28
Fatal error: Call to undefined function imagecreate() in /in/9LbR8 on line 87
Process exited with code 255.