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What is the main purpose of the PHP array_filter function?

easy📝 Conceptual Q1 of 15
PHP - Array Functions
What is the main purpose of the PHP array_filter function?
ATo remove elements from an array based on a condition
BTo sort an array in ascending order
CTo merge two arrays into one
DTo count the number of elements in an array
Step-by-Step Solution
Solution:
  1. Step 1: Understand the function's role

    The array_filter function checks each element and keeps only those that meet a condition.
  2. Step 2: Compare with other array functions

    Sorting, merging, and counting are different functions; array_filter specifically filters elements.
  3. Final Answer:

    To remove elements from an array based on a condition -> Option A
  4. Quick Check:

    Purpose of array_filter = Remove elements based on condition [OK]
Quick Trick: array_filter keeps elements passing a test [OK]
Common Mistakes:
  • Confusing filtering with sorting
  • Thinking it merges arrays
  • Assuming it counts elements

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