EP 01
== vs ===
Loose vs strict comparison and PHP type juggling.
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EP 02
implode() vs explode()
Converting between arrays and strings, both directions.
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EP 03
include vs require
What happens when a file is missing, and the _once variants.
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EP 04
array_combine() vs array_merge()
Zipping keys to values vs stacking arrays together.
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EP 05
sort vs asort vs ksort
Sorting by value, keeping keys, or sorting by key.
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EP 06
Fibonacci series
Turn the rule into a loop — plus the recursion follow-up.
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EP 07
Find & remove a value
in_array, array_search, and removing an element cleanly.
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EP 08
OOP: Classes & Objects
The first step into object-oriented PHP — blueprint vs instance.
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EP 09
OOP: Constructors
Use __construct to set up an object the moment it is created.
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