grapheme_substr Return part of a string &reftitle.description; &style.procedural; stringfalsegrapheme_substr stringstring intoffset intnulllength&null; Return part of a string &reftitle.parameters; string The input string. Must be valid UTF-8. offset Start position in default grapheme units. If offset is non-negative, the returned string will start at the offset'th position in string, counting from zero. If offset is negative, the returned string will start at the offset'th grapheme unit from the end of string. length Length in grapheme units. If length is given and is positive, the string returned will contain at most length grapheme units beginning from offset (depending on the length of string). If length is given and is negative, then that many grapheme units will be omitted from the end of string (after the start position has been calculated when offset is negative). If offset denotes a position beyond this truncation, an empty string will be returned. &reftitle.returnvalues; Returns the extracted part of string, &return.falseforfailure;. &reftitle.changelog; &Version; &Description; 8.0.0 The function now consistently clamps out-of-bounds offsets to the string boundary. Previously, &false; was returned instead of the empty string in some cases. &reftitle.examples; ]]> &example.outputs; &reftitle.seealso; grapheme_extract Unicode Text Segmentation: Grapheme Cluster Boundaries