mb_detect_encodingDetect character encoding
&reftitle.description;
stringfalsemb_detect_encodingstringstringarraystringnullencodings&null;boolstrict&false;
Detects the most likely character encoding for stringstring
from an ordered list of candidates.
Automatic detection of the intended character encoding can never be entirely reliable;
without some additional information, it is similar to decoding an encrypted string
without the key. It is always preferable to use an indication of character encoding
stored or transmitted with the data, such as a "Content-Type" HTTP header.
This function is most useful with multibyte encodings, where not all sequences of
bytes form a valid string. If the input string contains such a sequence, that
encoding will be rejected, and the next encoding checked.
The result is not accurate
The name of this function is misleading, it performs "guessing" rather than "detection".
The guesses are far from accurate, and therefore you cannot use this function to accurately
detect the correct character encoding.
&reftitle.parameters;
string
The string being inspected.
encodings
A list of character encodings to try, in order. The list may be specified as
an array of strings, or a single string separated by commas.
If encodings is omitted or &null;,
the current detect_order (set with the
mbstring.detect_order configuration option, or mb_detect_order
function) will be used.
strict
Controls the behaviour when string
is not valid in any of the listed encodings.
If strict is set to &false;, the closest matching
encoding will be returned; if strict is set to &true;,
&false; will be returned.
The default value for strict can be set
with the
mbstring.strict_detection configuration option.
&reftitle.returnvalues;
The detected character encoding, or &false; if the string is not valid
in any of the listed encodings.
&reftitle.changelog;
&Version;&Description;8.2.0mb_detect_encoding will no longer return
the following non text encodings:
"Base64", "QPrint",
"UUencode", "HTML entities",
"7 bit" and "8 bit".
&reftitle.examples;
mb_detect_encoding example
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&example.outputs;
Effect of strict parameter
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&example.outputs;
In some cases, the same sequence of bytes may form a valid string in multiple
character encodings, and it is impossible to know which interpretation was
intended. For instance, among many others, the byte sequence "\xC4\xA2" could be:
"Ä¢" (U+00C4 LATIN CAPITAL LETTER A WITH DIAERESIS followed by U+00A2 CENT SIGN)
encoded in any of ISO-8859-1, ISO-8859-15, or Windows-1252
"ФЂ" (U+0424 CYRILLIC CAPITAL LETTER EF followed by U+0402 CYRILLIC CAPITAL LETTER
DJE) encoded in ISO-8859-5
"Ģ" (U+0122 LATIN CAPITAL LETTER G WITH CEDILLA) encoded in UTF-8
Effect of order when multiple encodings match
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&example.outputs;
&reftitle.seealso;
mb_detect_order