PHP - Variables and Data Types
Which of the following variable names is not allowed in PHP?
Which of the following variable names is not allowed in PHP?
easy📝 Conceptual Q1 of 15
Step-by-Step Solution
Solution:
Step 1: Understand PHP variable naming rules
PHP variable names must start with a letter or underscore, not a number.Step 2: Check each option
$2ndUser starts with '2', which is invalid. Others start with letters or underscore.Final Answer:
$2ndUser is invalid because it starts with a number. -> Option BQuick Check:
Variable names cannot start with numbers = C [OK]
Quick Trick: Variable names must start with letter or underscore, never a number [OK]
Common Mistakes:
- Starting variable names with digits
- Using spaces in variable names
- Starting with special characters other than underscore
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