uniqid Generate a unique ID &reftitle.description; stringuniqid stringprefix"" boolmore_entropyfalse Gets a prefixed unique identifier based on the current time in microseconds. &reftitle.parameters; prefix Can be useful, for instance, if you generate identifiers simultaneously on several hosts that might happen to generate the identifier at the same microsecond. With an empty prefix, the returned string will be 13 characters long. If more_entropy is &true;, it will be 23 characters. more_entropy If set to &true;, uniqid will add additional entropy (using the combined linear congruential generator) at the end of the return value, which should make the results more unique. &reftitle.returnvalues; Returns the unique identifier, as a string. &reftitle.examples; ]]> &reftitle.changelog; &Version; &Description; 5.0.0 The prefix parameter was made optional. 4.3.1 The limit of 114 characters long for prefix was raised. &reftitle.notes; Under Cygwin, the more_entropy must be set to &true; for this function to work.