voku /
portable-utf8
| @@ 2949-2996 (lines=48) @@ | ||
| 2946 | * <strong>2</strong> for UTF-16BE. |
|
| 2947 | * </p> |
|
| 2948 | */ |
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| 2949 | public static function is_utf16($str) |
|
| 2950 | { |
|
| 2951 | $str = self::remove_bom($str); |
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| 2952 | ||
| 2953 | if (self::is_binary($str) === true) { |
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| 2954 | ||
| 2955 | $maybeUTF16LE = 0; |
|
| 2956 | $test = \mb_convert_encoding($str, 'UTF-8', 'UTF-16LE'); |
|
| 2957 | if ($test) { |
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| 2958 | $test2 = \mb_convert_encoding($test, 'UTF-16LE', 'UTF-8'); |
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| 2959 | $test3 = \mb_convert_encoding($test2, 'UTF-8', 'UTF-16LE'); |
|
| 2960 | if ($test3 === $test) { |
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| 2961 | $strChars = self::count_chars($str, true); |
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| 2962 | foreach (self::count_chars($test3, true) as $test3char => $test3charEmpty) { |
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| 2963 | if (in_array($test3char, $strChars, true) === true) { |
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| 2964 | $maybeUTF16LE++; |
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| 2965 | } |
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| 2966 | } |
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| 2967 | } |
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| 2968 | } |
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| 2969 | ||
| 2970 | $maybeUTF16BE = 0; |
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| 2971 | $test = \mb_convert_encoding($str, 'UTF-8', 'UTF-16BE'); |
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| 2972 | if ($test) { |
|
| 2973 | $test2 = \mb_convert_encoding($test, 'UTF-16BE', 'UTF-8'); |
|
| 2974 | $test3 = \mb_convert_encoding($test2, 'UTF-8', 'UTF-16BE'); |
|
| 2975 | if ($test3 === $test) { |
|
| 2976 | $strChars = self::count_chars($str, true); |
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| 2977 | foreach (self::count_chars($test3, true) as $test3char => $test3charEmpty) { |
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| 2978 | if (in_array($test3char, $strChars, true) === true) { |
|
| 2979 | $maybeUTF16BE++; |
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| 2980 | } |
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| 2981 | } |
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| 2982 | } |
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| 2983 | } |
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| 2984 | ||
| 2985 | if ($maybeUTF16BE !== $maybeUTF16LE) { |
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| 2986 | if ($maybeUTF16LE > $maybeUTF16BE) { |
|
| 2987 | return 1; |
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| 2988 | } else { |
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| 2989 | return 2; |
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| 2990 | } |
|
| 2991 | } |
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| 2992 | ||
| 2993 | } |
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| 2994 | ||
| 2995 | return false; |
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| 2996 | } |
|
| 2997 | ||
| 2998 | /** |
|
| 2999 | * Check if the string is UTF-32. |
|
| @@ 3009-3056 (lines=48) @@ | ||
| 3006 | * <strong>2</strong> for UTF-32BE. |
|
| 3007 | * </p> |
|
| 3008 | */ |
|
| 3009 | public static function is_utf32($str) |
|
| 3010 | { |
|
| 3011 | $str = self::remove_bom($str); |
|
| 3012 | ||
| 3013 | if (self::is_binary($str) === true) { |
|
| 3014 | ||
| 3015 | $maybeUTF32LE = 0; |
|
| 3016 | $test = \mb_convert_encoding($str, 'UTF-8', 'UTF-32LE'); |
|
| 3017 | if ($test) { |
|
| 3018 | $test2 = \mb_convert_encoding($test, 'UTF-32LE', 'UTF-8'); |
|
| 3019 | $test3 = \mb_convert_encoding($test2, 'UTF-8', 'UTF-32LE'); |
|
| 3020 | if ($test3 === $test) { |
|
| 3021 | $strChars = self::count_chars($str, true); |
|
| 3022 | foreach (self::count_chars($test3, true) as $test3char => $test3charEmpty) { |
|
| 3023 | if (in_array($test3char, $strChars, true) === true) { |
|
| 3024 | $maybeUTF32LE++; |
|
| 3025 | } |
|
| 3026 | } |
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| 3027 | } |
|
| 3028 | } |
|
| 3029 | ||
| 3030 | $maybeUTF32BE = 0; |
|
| 3031 | $test = \mb_convert_encoding($str, 'UTF-8', 'UTF-32BE'); |
|
| 3032 | if ($test) { |
|
| 3033 | $test2 = \mb_convert_encoding($test, 'UTF-32BE', 'UTF-8'); |
|
| 3034 | $test3 = \mb_convert_encoding($test2, 'UTF-8', 'UTF-32BE'); |
|
| 3035 | if ($test3 === $test) { |
|
| 3036 | $strChars = self::count_chars($str, true); |
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| 3037 | foreach (self::count_chars($test3, true) as $test3char => $test3charEmpty) { |
|
| 3038 | if (in_array($test3char, $strChars, true) === true) { |
|
| 3039 | $maybeUTF32BE++; |
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| 3040 | } |
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| 3041 | } |
|
| 3042 | } |
|
| 3043 | } |
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| 3044 | ||
| 3045 | if ($maybeUTF32BE !== $maybeUTF32LE) { |
|
| 3046 | if ($maybeUTF32LE > $maybeUTF32BE) { |
|
| 3047 | return 1; |
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| 3048 | } else { |
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| 3049 | return 2; |
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| 3050 | } |
|
| 3051 | } |
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| 3052 | ||
| 3053 | } |
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| 3054 | ||
| 3055 | return false; |
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| 3056 | } |
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| 3057 | ||
| 3058 | /** |
|
| 3059 | * Checks whether the passed string contains only byte sequences that appear valid UTF-8 characters. |
|
