How can you compare two strings in PHP to check if they are equal ignoring case and whitespace differences at the start and end?

hard📝 Application Q9 of 15

PHP - String Functions

AUse strcasecmp(trim($str1), trim($str2))

BUse strcmp(trim($str1), trim($str2))

CUse strncasecmp($str1, $str2, strlen($str1))

DUse substr_compare($str1, $str2, 0, strlen($str1))

Step-by-Step Solution

Solution:

Step 1: Remove whitespace from both strings
Use trim() to remove spaces at start and end.
Step 2: Compare ignoring case
Use strcasecmp() on trimmed strings to ignore case differences.
Final Answer:
Use strcasecmp(trim($str1), trim($str2)) -> Option A
Quick Check:
Trim then case-insensitive compare = strcasecmp(trim()) [OK]

Quick Trick: Trim strings before strcasecmp() to ignore whitespace [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