voku /
portable-utf8
| @@ 2948-2995 (lines=48) @@ | ||
| 2945 | * <strong>2</strong> for UTF-16BE. |
|
| 2946 | * </p> |
|
| 2947 | */ |
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| 2948 | public static function is_utf16($str) |
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| 2949 | { |
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| 2950 | $str = self::remove_bom($str); |
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| 2951 | ||
| 2952 | if (self::is_binary($str) === true) { |
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| 2953 | ||
| 2954 | $maybeUTF16LE = 0; |
|
| 2955 | $test = \mb_convert_encoding($str, 'UTF-8', 'UTF-16LE'); |
|
| 2956 | if ($test) { |
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| 2957 | $test2 = \mb_convert_encoding($test, 'UTF-16LE', 'UTF-8'); |
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| 2958 | $test3 = \mb_convert_encoding($test2, 'UTF-8', 'UTF-16LE'); |
|
| 2959 | if ($test3 === $test) { |
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| 2960 | $strChars = self::count_chars($str, true); |
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| 2961 | foreach (self::count_chars($test3, true) as $test3char => $test3charEmpty) { |
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| 2962 | if (in_array($test3char, $strChars, true) === true) { |
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| 2963 | $maybeUTF16LE++; |
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| 2964 | } |
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| 2965 | } |
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| 2966 | } |
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| 2967 | } |
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| 2968 | ||
| 2969 | $maybeUTF16BE = 0; |
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| 2970 | $test = \mb_convert_encoding($str, 'UTF-8', 'UTF-16BE'); |
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| 2971 | if ($test) { |
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| 2972 | $test2 = \mb_convert_encoding($test, 'UTF-16BE', 'UTF-8'); |
|
| 2973 | $test3 = \mb_convert_encoding($test2, 'UTF-8', 'UTF-16BE'); |
|
| 2974 | if ($test3 === $test) { |
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| 2975 | $strChars = self::count_chars($str, true); |
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| 2976 | foreach (self::count_chars($test3, true) as $test3char => $test3charEmpty) { |
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| 2977 | if (in_array($test3char, $strChars, true) === true) { |
|
| 2978 | $maybeUTF16BE++; |
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| 2979 | } |
|
| 2980 | } |
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| 2981 | } |
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| 2982 | } |
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| 2983 | ||
| 2984 | if ($maybeUTF16BE !== $maybeUTF16LE) { |
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| 2985 | if ($maybeUTF16LE > $maybeUTF16BE) { |
|
| 2986 | return 1; |
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| 2987 | } else { |
|
| 2988 | return 2; |
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| 2989 | } |
|
| 2990 | } |
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| 2991 | ||
| 2992 | } |
|
| 2993 | ||
| 2994 | return false; |
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| 2995 | } |
|
| 2996 | ||
| 2997 | /** |
|
| 2998 | * Check if the string is UTF-32. |
|
| @@ 3008-3055 (lines=48) @@ | ||
| 3005 | * <strong>2</strong> for UTF-32BE. |
|
| 3006 | * </p> |
|
| 3007 | */ |
|
| 3008 | public static function is_utf32($str) |
|
| 3009 | { |
|
| 3010 | $str = self::remove_bom($str); |
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| 3011 | ||
| 3012 | if (self::is_binary($str) === true) { |
|
| 3013 | ||
| 3014 | $maybeUTF32LE = 0; |
|
| 3015 | $test = \mb_convert_encoding($str, 'UTF-8', 'UTF-32LE'); |
|
| 3016 | if ($test) { |
|
| 3017 | $test2 = \mb_convert_encoding($test, 'UTF-32LE', 'UTF-8'); |
|
| 3018 | $test3 = \mb_convert_encoding($test2, 'UTF-8', 'UTF-32LE'); |
|
| 3019 | if ($test3 === $test) { |
|
| 3020 | $strChars = self::count_chars($str, true); |
|
| 3021 | foreach (self::count_chars($test3, true) as $test3char => $test3charEmpty) { |
|
| 3022 | if (in_array($test3char, $strChars, true) === true) { |
|
| 3023 | $maybeUTF32LE++; |
|
| 3024 | } |
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| 3025 | } |
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| 3026 | } |
|
| 3027 | } |
|
| 3028 | ||
| 3029 | $maybeUTF32BE = 0; |
|
| 3030 | $test = \mb_convert_encoding($str, 'UTF-8', 'UTF-32BE'); |
|
| 3031 | if ($test) { |
|
| 3032 | $test2 = \mb_convert_encoding($test, 'UTF-32BE', 'UTF-8'); |
|
| 3033 | $test3 = \mb_convert_encoding($test2, 'UTF-8', 'UTF-32BE'); |
|
| 3034 | if ($test3 === $test) { |
|
| 3035 | $strChars = self::count_chars($str, true); |
|
| 3036 | foreach (self::count_chars($test3, true) as $test3char => $test3charEmpty) { |
|
| 3037 | if (in_array($test3char, $strChars, true) === true) { |
|
| 3038 | $maybeUTF32BE++; |
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| 3039 | } |
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| 3040 | } |
|
| 3041 | } |
|
| 3042 | } |
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| 3043 | ||
| 3044 | if ($maybeUTF32BE !== $maybeUTF32LE) { |
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| 3045 | if ($maybeUTF32LE > $maybeUTF32BE) { |
|
| 3046 | return 1; |
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| 3047 | } else { |
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| 3048 | return 2; |
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| 3049 | } |
|
| 3050 | } |
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| 3051 | ||
| 3052 | } |
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| 3053 | ||
| 3054 | return false; |
|
| 3055 | } |
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| 3056 | ||
| 3057 | /** |
|
| 3058 | * Checks whether the passed string contains only byte sequences that appear valid UTF-8 characters. |
|
