| | |
|---|
| | | return $mime_type; |
|---|
| | | } |
|---|
| | | |
|---|
| | | |
|---|
| | | /** |
|---|
| | | * Detect image type of the given binary data by checking magic numbers |
|---|
| | | * |
|---|
| | | * @param string Binary file content |
|---|
| | | * @return string Detected mime-type or jpeg as fallback |
|---|
| | | */ |
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| | | function rc_image_content_type($data) |
|---|
| | | { |
|---|
| | | $type = 'jpeg'; |
|---|
| | | if (preg_match('/^\x89\x50\x4E\x47/', $data)) $type = 'png'; |
|---|
| | | else if (preg_match('/^\x47\x49\x46\x38/', $data)) $type = 'gif'; |
|---|
| | | else if (preg_match('/^\x00\x00\x01\x00/', $data)) $type = 'ico'; |
|---|
| | | // else if (preg_match('/^\xFF\xD8\xFF\xE0/', $data)) $type = 'jpeg'; |
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| | | |
|---|
| | | return 'image/' . $type; |
|---|
| | | } |
|---|
| | | |
|---|
| | | |
|---|
| | | /** |
|---|
| | | * A method to guess encoding of a string. |
|---|
| | | * |
|---|
