reference/dir/functions/chdir.xml
dec1f8445ab2af7fbafef012fb7907ab2cd349b5
dec1f8445ab2af7fbafef012fb7907ab2cd349b5
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</para>
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</refsect1>
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<refsect1 role="errors">
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&reftitle.errors;
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<para>
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Throws an error of level <constant>E_WARNING</constant> on failure.
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</para>
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</refsect1>
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<refsect1 role="examples">
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&reftitle.examples;
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<para>
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@@ -75,7 +82,18 @@ echo getcwd() . "\n";
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<refsect1 role="notes">
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&reftitle.notes;
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¬e.sm.uidcheck.dir;
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<caution>
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<para>
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If the PHP interpreter has been built with ZTS (Zend Thread Safety) enabled,
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any changes to the current directory made through <function>chdir</function>
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will be invisible to the operating system. All built-in PHP functions will
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still respect the change in current directory; but external library
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functions called using <link linkend="book.ffi">FFI</link> will not. You
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can tell whether your copy of PHP was built with ZTS enabled using
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<command>php -i</command> or the built-in constant
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<constant>PHP_ZTS</constant>.
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</para>
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</caution>
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</refsect1>
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<refsect1 role="seealso">
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