Given the string $data = 'user@example.com', how can you extract the domain part (after '@') using strstr?

hard📝 Application Q9 of 15

PHP - String Functions

Given the string $data = 'user@example.com', how can you extract the domain part (after '@') using strstr?

A$domain = strstr($data, '@', true);

B$domain = strpos($data, '@');

C$domain = strstr($data, '@') + 1;

D$domain = strstr($data, '@');

Step-by-Step Solution

Solution:

Step 1: Understand strstr with third parameter
By default, strstr returns substring from first occurrence to end, including the searched character.
Step 2: Apply to extract domain
$domain = strstr($data, '@'); returns '@example.com'. $domain = strstr($data, '@', true); returns part before '@'. $domain = strstr($data, '@') + 1; is invalid arithmetic. $domain = strpos($data, '@'); returns position, not substring.
Final Answer:
$domain = strstr($data, '@'); -> Option D
Quick Check:
strstr returns substring including '@' by default [OK]

Quick Trick: strstr returns substring including searched char by default [OK]

Common Mistakes:

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