You want to check if a user's input stored in $input is exactly 8 characters long. Which PHP code correctly performs this check?

hard📝 Application Q15 of 15

PHP - String Functions

You want to check if a user's input stored in $input is exactly 8 characters long. Which PHP code correctly performs this check?

Aif (strlen($input) > 8) { echo "Valid length"; } else { echo "Invalid length"; }

Bif (count($input) == 8) { echo "Valid length"; } else { echo "Invalid length"; }

Cif (strlen($input) == 8) { echo "Valid length"; } else { echo "Invalid length"; }

Dif (strlen($input) != 8) { echo "Valid length"; } else { echo "Invalid length"; }

Step-by-Step Solution

Solution:

Step 1: Use strlen() to get string length
The function strlen($input) returns the number of characters in the input string.
Step 2: Compare length to 8 exactly
The condition strlen($input) == 8 checks if the length is exactly 8 characters.
Step 3: Understand other options
if (count($input) == 8) { echo "Valid length"; } else { echo "Invalid length"; } uses count() which is for arrays, not strings. if (strlen($input) > 8) { echo "Valid length"; } else { echo "Invalid length"; } checks if length is greater than 8, not equal. if (strlen($input) != 8) { echo "Valid length"; } else { echo "Invalid length"; } reverses logic.
Final Answer:
if (strlen($input) == 8) { echo "Valid length"; } else { echo "Invalid length"; } -> Option C
Quick Check:
Use strlen() == 8 to check exact length [OK]

Quick Trick: Use strlen() == 8 to check exact string length [OK]

Common Mistakes:

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