Live coding
PHP Interview Copilot
Modern PHP interviews look nothing like the language's reputation — expect strict types, real dependency injection, and questions about the request lifecycle.
The round
What a PHP interview actually looks like
A PHP screen usually mixes a small algorithm with questions about how the language behaves under the hood: how arrays are actually implemented, what happens between requests, how autoloading and the container fit together in whichever framework the team runs. Interviewers often probe whether you have kept up with the last several major versions, since the honest answer to many older interview questions is that the behaviour changed. Teams running Laravel or Symfony usually finish with a question about the service container and when a binding is resolved.
What you get back
Solutions use current PHP — constructor property promotion, typed properties, enums, and strict comparison throughout. Array functions are used where they beat a foreach, and the answer notes that arrays are ordered hash maps rather than lists, since half the tricky questions follow from that. Where behaviour changed between versions, the answer says which version it assumes.
Example prompts
Questions people are actually asked
Send the transcript straight to the coding surface, or snip the problem off the screen.
Why does this loose comparison return true?
Deduplicate a list of records by a composite key.
What survives between two requests, and what does not?
Where candidates lose points
PHP-specific traps
Loose comparison
The double-equals operator's coercion rules are the most-set trap in a PHP screen. Using strict comparison and being able to explain the difference is the whole answer.
Arrays as lists
PHP arrays are ordered maps, so unset leaves gaps in the keys and a later json_encode produces an object rather than an array.
Reference semantics in foreach
A by-reference loop variable that is reused afterwards corrupts the last element, which is a bug interviewers enjoy watching candidates find.
Three surfaces
One workspace, three kinds of round
Chat
Behavioral rounds and the “tell me about a time” half of a technical screen, in your own voice.
Live coding
A structured solution with the reasoning attached, so you can talk through the code while you write it.
System design
Architecture answers with the diagram rendered inline, not described in prose.
Choosing a model
Keep reading
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Platform setup: hackerrank · codility