PHP - Variables and Data Types
You want to filter an array to keep only numeric values, but some values are strings containing numbers. Which PHP function best helps to check if a value is numeric before filtering?
You want to filter an array to keep only numeric values, but some values are strings containing numbers. Which PHP function best helps to check if a value is numeric before filtering?
hard📝 Application Q8 of 15
Step-by-Step Solution
Solution:
Step 1: Understand the need to check numeric strings
Values like '123' are strings but represent numbers.Step 2: Identify function that checks numeric values including numeric strings
is_numeric()returns true for numbers and numeric strings.Final Answer:
is_numeric() -> Option AQuick Check:
Use is_numeric() to check numbers and numeric strings = D [OK]
Quick Trick: Use is_numeric() to check numbers and numeric strings [OK]
Common Mistakes:
- Using is_int() which excludes numeric strings.
- Using is_string() which only checks type, not numeric content.
- Using is_bool() which is unrelated.
Master "Variables and Data Types" in PHP
Want More Practice?
15+ quiz questions · All difficulty levels · Free
Free Signup - Practice All QuestionsMore PHP Quizzes