Given $input = " 123abc123 ", which code removes digits only from both ends but keeps letters and spaces inside?

hard📝 Application Q9 of 15

PHP - String Functions

Given $input = " 123abc123 ", which code removes digits only from both ends but keeps letters and spaces inside?

Atrim($input, "0123456789")

Btrim($input, " ")

Crtrim($input, "123")

Dltrim($input, "abc")

Step-by-Step Solution

Solution:

Step 1: Understand the goal
Remove digits from both ends only, keep letters and spaces inside.
Step 2: Analyze trim() with digit mask
trim() with "0123456789" removes digits from both ends.
Step 3: Check other options
trim($input, " ") removes spaces only, rtrim() and ltrim() remove from one side and with wrong chars.
Final Answer:
trim($input, "0123456789") -> Option A
Quick Check:
trim() with digits removes digits ends [OK]

Quick Trick: Use trim() with digits string to remove digits ends [OK]

Common Mistakes:

Master "String Functions" in PHP

9 interactive learning modes - each teaches the same concept differently

Want More Practice?

15+ quiz questions · All difficulty levels · Free

More PHP Quizzes