PHP GetText Use method attach strange bug One

Whim, suddenly want to study PHP multi-language.

Look at the company's projects and WordPress are used by the GetText () to multi-lingual.

Then open the PHP manual to copy the following paragraph

<?PHP//Set language to Germanputenv(' Lc_all=de_de ');setlocale(Lc_all, ' De_de '); //specify location of translation tablesBindtextdomain ("Myphpapp", "./locale"); //Choose DomainTextdomain ("Myphpapp"); //translation is looking for in./locale/de_de/lc_messages/myphpapp.mo Now//Print a test messageEchoGetText ("Welcome to My PHP application"); //Or Use the alias _ () for GetText ()Echo_ ("A Nice Day");?>

And then I got a poedit on the net to compile Mo files.

The result is a lazy process, which changes the MO file name to test and assigns the Textdomin value in the code to test.

Oh..... It turned out to be tragic.

GetText () function kill translation.

And then all sorts of attempts. The following are unscientific experimental processes (function requirements Textdomain values need to be consistent with Mo filenames)

Textdomain value	MO file Name	GetText Running Status	Comments
He	He.mo	Normal
Heh	Heh.mo	Normal
Test	Test.mo	Flutter Street
Zh_cn	Zh_cn.mo	Flutter Street
Zh_cn	Zh__cn.mo	Normal	The middle is two underline
Hehe	Hehe.mo	Flutter Street
Heheh	Heheh.mo	Normal	Normal starting from the length of the stored character greater than or equal to 5 o'clock
Hehehehe	Hehehehe.mo	Normal
Heheheheh	Heheheheh.mo	Normal
Hehehehehe	Hehehehehe.mo	Normal
Myphpapp	Myphpapp.mo	Normal
Myphpapp	Myphpapp.mo	Normal
Translations	Translations.mo	Normal

Conclusion: GetText translation function corresponds to the value of Textdomain is equal to 4 characters (or add an underscore), there will be a bug read error (Note: When the Textdomain value and Mo file name does not correspond, the system will try to look in the cache, if there is a cache, The GetText can work properly.

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PHP GetText Use method attach strange bug One