string_part [function]

string_part( string str, int from[, int len[, int flags]] )

returns a part of string str, starting at from, at most len characters

• if len is not specified, len is assumed to be the number of characters between from and the end of string str
• if from is negative, it points to characters before the end of string (-1 being the last one)
• if len is negative, the maximum length of returned string is the sum of len and string str length
• available values for flags:
  • STRING_NO_REV_INDEX - emit warnings on negative indices, instead of handling them
  • STRING_STRICT_RANGES - emit warnings on out of bounds from/len values instead of silently ignoring the outside characters

string_part( "01234567", 3, 3 ); // string [3] "345"