You have a string $data = "user:john;id:12345;role:admin";. How do you extract the user name "john" using substr and strpos functions in PHP?

hard📝 Application Q15 of 15

PHP - String Functions

You have a string $data = "user:john;id:12345;role:admin";. How do you extract the user name "john" using substr and strpos functions in PHP?

Asubstr($data, 0, strpos($data, ':'));

Bsubstr($data, 5, 4);

Csubstr($data, strpos($data, ';') + 1, 4);

Dsubstr($data, strpos($data, ':') + 1, strpos($data, ';') - strpos($data, ':') - 1);

Step-by-Step Solution

Solution:

Step 1: Find start position of username
Use strpos($data, ':') to find colon after "user", add 1 to start after colon.
Step 2: Find length of username substring
Find position of first semicolon with strpos($data, ';'), subtract start position and 1 to get length.
Step 3: Use substr with calculated start and length
substr($data, start, length) extracts "john" correctly.
Final Answer:
substr($data, strpos($data, ':') + 1, strpos($data, ';') - strpos($data, ':') - 1); -> Option D
Quick Check:
Use strpos to find delimiters, substr extracts between them [OK]

Quick Trick: Use strpos to find delimiters, substr extracts between them [OK]

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