You want to compare two variables in PHP: $a = '0' (string) and $b = false (boolean). Which comparison returns true when using type coercion, and which returns false when checking type strictly?

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PHP - Type Handling

You want to compare two variables in PHP: $a = '0' (string) and $b = false (boolean). Which comparison returns true when using type coercion, and which returns false when checking type strictly?

Choose the correct pair:

A<code>$a == $b</code> is true; <code>$a === $b</code> is false

B<code>$a == $b</code> is false; <code>$a === $b</code> is true

C<code>$a == $b</code> is true; <code>$a === $b</code> is true

D<code>$a == $b</code> is false; <code>$a === $b</code> is false

Step-by-Step Solution

Solution:

Step 1: Understand loose (==) vs strict (===) comparison
Loose comparison converts types before comparing; strict compares value and type exactly.
Step 2: Evaluate comparisons
Loose: '0' converts to 0, false converts to 0, so 0 == 0 is true. Strict: '0' is string, false is boolean, types differ, so false.
Final Answer:
$a == $b is true; $a === $b is false -> Option A
Quick Check:
'0' == false is true; '0' === false is false [OK]

Quick Trick: Use === to check type and value, == allows type coercion [OK]

Common Mistakes:

Assuming == checks type strictly
Thinking '0' and false are always different
Confusing loose and strict equality

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You want to compare two variables in PHP: $a = '0' (string) and $b = false (boolean). Which comparison returns true when using type coercion, and which returns false when checking type strictly?

Step 1: Understand loose (==) vs strict (===) comparison

Step 2: Evaluate comparisons

Final Answer:

Quick Check:

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