Which PHP function returns the key of a value in an array if found, or false if not found?

easy📝 Conceptual Q11 of 15

PHP - Arrays

Which PHP function returns the key of a value in an array if found, or false if not found?

A<code>in_array</code>

B<code>array_search</code>

C<code>array_key_exists</code>

D<code>array_keys</code>

Step-by-Step Solution

Solution:

Step 1: Understand function purpose
array_search looks for a value and returns its key if found.
Step 2: Compare with other functions
in_array returns true/false, not key; array_key_exists checks keys; array_keys returns all keys.
Final Answer:
array_search -> Option B
Quick Check:
Key returned by array_search = array_search [OK]

Quick Trick: array_search returns key, in_array returns true/false [OK]

Common Mistakes:

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