How many elements does the array $matches from the following code contain? $str = "The cat sat on the roof of their house."; $matches = preg_split("/(the)/i", $str, -1, PREG_SPLIT_DELIM_CAPTURE);

Question

Options

• A2
• B3
• C4
• D7
• E9

• A
  6% (2)
• C
  3% (1)
• D
  81% (26)
• E
  9% (3)

Explanation

preg_split with PREG_SPLIT_DELIM_CAPTURE returns both the split parts and the captured delimiter matches. The pattern /(the)/i matches "the" case-insensitively three times in the string: "The" (start), "the" (in "the roof"), and "the" (in "their"). Three delimiters produce four surrounding parts ("", " cat sat on ", " roof of ", "ir house."), and inserting the three captured delimiters between them yields 7 elements total.

Why the distractors fail:

• C (4) is the most tempting wrong answer - it's the result without PREG_SPLIT_DELIM_CAPTURE, where only the surrounding parts are returned (4 parts from 3 split points).
• B (3) reflects only the count of "the" matches, ignoring what preg_split actually returns.
• E (9) would require four delimiter matches, not three.
• A (2) has no reasonable basis in this context.

Memory tip: Think of PREG_SPLIT_DELIM_CAPTURE as "keep the scissors in the bag" - every time the string is cut, the cutter (captured group) gets tucked into the result array between the pieces. Formula: (n delimiters × 2) + 1 → here (3 × 2) + 1 = 7.

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