Online PHP editor | output for b9b6q

@ 2016-08-24T12:34:50Z

<?php


// This returns as expected.
$str = "\xf8foo";
var_dump(
    mb_detect_encoding($str, 'UTF-8'),      // bool(false)
    mb_detect_encoding($str, 'UTF-8', true) // bool(false)
);

// This does not.
$str = "foo\xf8";
var_dump(
    mb_detect_encoding($str, 'UTF-8'),      // string(5) "UTF-8"
    mb_detect_encoding($str, 'UTF-8', true) // bool(false)
);

// Nor does this.
$str = "\xe1\xe9\xf3\xfa";
var_dump(
    mb_detect_encoding($str, 'UTF-8'),      // string(5) "UTF-8"
    mb_detect_encoding($str, 'UTF-8', true) // bool(false)
);

Output for 8.3.0 - 8.3.4, 8.3.6: string(5) "UTF-8" bool(false) string(5) "UTF-8" bool(false) string(5) "UTF-8" bool(false)
Output for 8.3.5: Warning: PHP Startup: Unable to load dynamic library 'sodium.so' (tried: /usr/lib/php/8.3.5/modules/sodium.so (libsodium.so.23: cannot open shared object file: No such file or directory), /usr/lib/php/8.3.5/modules/sodium.so.so (/usr/lib/php/8.3.5/modules/sodium.so.so: cannot open shared object file: No such file or directory)) in Unknown on line 0 string(5) "UTF-8" bool(false) string(5) "UTF-8" bool(false) string(5) "UTF-8" bool(false)
Output for 5.6.0 - 5.6.25, 7.0.0 - 7.0.20, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18: bool(false) bool(false) string(5) "UTF-8" bool(false) string(5) "UTF-8" bool(false)

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