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PHP · Theory

array_replace_recursive()

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Theory

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array_replace_recursive()

If you can teach array_replace_recursive() (function) using a array_replace_recursive function dry-run, you know it. If you only know the heading, you don’t.

array_replace_recursive() (function) order: meaning → one array_replace_recursive function step Amit can write from memory → one limit. Dumping ten features helps nobody.

Without array_replace_recursive() (function), a small live site gets messy and a array_replace_recursive function dry-run is hard to trust.

Amit ships array_replace_recursive() (function) in a small live site. That is the use case worth saying.

Don’t do this with array_replace_recursive() (function): only reciting the name of array_replace_recursive function. Interviewers spot it in ten seconds.

After array_replace_recursive() (function), Amit should still remember only reciting the name of array_replace_recursive function.

Close array_replace_recursive() (function) with: “If I skip it, a array_replace_recursive function dry-run goes wrong like this: only reciting the name of array_replace_recursive function.”

Exam tip

For array_replace_recursive() (function): definition + a small live site + one failure.

Example

<?php
// array_replace_recursive()
$scores = [80, 90, 70];
$avg = array_sum($scores) / count($scores);
echo "avg=" . number_format($avg, 1) . "\n";
foreach ($scores as $s) {
  if ($s >= 80) echo "high: $s\n";
}

array_replace_recursive(): scores array, print avg, then high marks. Say the output.

Short notes

  • Defarray_replace_recursive() (function) — Amit uses it for a array_replace_recursive function dry-run in a small live site.
  • Rulearray_replace_recursive() (function) → one array_replace_recursive function step Amit can write from memory.
  • Rememberarray_replace_recursive() (function) + the PHP runtime (a small live site).
  • Usearray_replace_recursive() (function) in a small live site (a array_replace_recursive function dry-run).
  • Traparray_replace_recursive() (function) — only reciting the name of array_replace_recursive function.
  • Exarray_replace_recursive() (function) → a array_replace_recursive function dry-run.

Questions

1

Amit asks: why does array_replace_recursive() (function) exist? Use a array_replace_recursive function dry-run.

2

When would Amit actually reach for array_replace_recursive() (function)?

3

Which mistake makes a array_replace_recursive function dry-run fail?

4

Change one input on a array_replace_recursive function dry-run. Predict the new result.

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