Which of the following is the correct syntax to extract a substring from a string $str starting at position 4 with length 5 in PHP?

easy📝 Syntax Q12 of 15

PHP - String Functions

Which of the following is the correct syntax to extract a substring from a string $str starting at position 4 with length 5 in PHP?

Asubstr($str, 5);

Bsubstr($str, 4, 5);

Csubstr($str, 4);

Dsubstr($str, 5, 4);

Step-by-Step Solution

Solution:

Step 1: Recall substr syntax
substr(string, start, length) extracts substring starting at 'start' index with 'length' characters.
Step 2: Match parameters to question
Start is 4, length is 5, so substr($str, 4, 5) is correct syntax.
Final Answer:
substr($str, 4, 5); -> Option B
Quick Check:
substr($str, 4, 5) = correct syntax [OK]

Quick Trick: Syntax is substr(string, start, length) with start zero-based [OK]

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