PHP with Image Search

Perceptual hashing algorithm
Count < = 5 Match most similar
Count > 102 Different pictures
Var_dump (Imagehash::run (' 1.jpg ', ' 2.jpg '));

<?

Class Imagehash {Const File_not_found = '-1 ';         Const File_extname_illegal = '-2 ';        Private Function __construct () {} public static function run ($src 1, $src 2) {static $self;                 if (! $self) $self = new Static;         if (!is_file ($src 1) | |!is_file ($SRC 2)) exit (Self::file_not_found);        $hash 1 = $self->gethashvalue ($src 1);                 $hash 2 = $self->gethashvalue ($src 2);                 if (strlen ($hash 1)!== strlen ($hash 2)) return false;        $count = 0;        $len = strlen ($hash 1);        for ($i = 0; $i < $len; $i + +) if ($hash 1[$i]!== $hash 2[$i]) $count + +; Return $count <= 10?     True:false;        Public Function GetImage ($file) {$extname = PathInfo ($file, pathinfo_extension);        if (!in_array ($extname, [' jpg ', ' jpeg ', ' png ', ' gif ')]) exit (Self::file_extname_illegal); $img = Call_user_func (' Imagecreatefrom '. ($extname = = ' jpg '?        ' JPEG ': $extname), $file); Return $img;        The Public Function Gethashvalue ($file) {$w = 8;        $h = 8;        $img = Imagecreatetruecolor ($w, $h);        List ($src _w, $src _h) = getimagesize ($file);        $SRC = $this->getimage ($file);        Imagecopyresampled ($img, $src, 0, 0, 0, 0, $w, $h, $src _w, $src _h);                 Imagedestroy ($SRC);        $total = 0;        $array = Array (); for ($y = 0; $y < $h; $y + +) {for ($x = 0; $x < $w; $x + +) {$gray = (Imagecolorat ($img, $x                , $y) >> 8) & 0xFF;                if (!isset ($array [$y])) $array [$y] = array ();                $array [$y] [$x] = $gray;            $total + = $gray;                 }} Imagedestroy ($IMG);        $average = Intval ($total/($W * $h * 2));        $hash = "; for ($y = 0; $y < $h; $y + +) {for ($x = 0; $x < $w; $x + +) {$hash. = ($array [$y] [$x] >= $ Average)?            ' 1 ': ' 0 ';    }        }             Var_dump ($hash);             return $hash; }     }

Call method Comparison returns the result bool value

Var_dump (Imagehash::run (' 1.jpg ', ' 2.jpg '));

PHP with Image Search