PHP · Theory

array_intersect()

Theory

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array_intersect()

If you can teach array_intersect() (function) using Ananya walking through array_intersect function, you know it. If you only know the heading, you don’t.

array_intersect() (function) on the board: one array_intersect function step Ananya can write from memory. Then say what Ananya walking through array_intersect function looks like after.

Skip array_intersect() (function) and copy-pasting array_intersect function without a dry-run shows up in a first job task.

Ananya ships array_intersect() (function) in a first job task. That is the use case worth saying.

array_intersect() (function) miss: copy-pasting array_intersect function without a dry-run. Fix it before you talk about advanced PHP.

array_intersect() (function) is not a lonely heading. Ananya ties it to Ananya walking through array_intersect function.

Viva for array_intersect() (function): what it is → one array_intersect function step Ananya can write from memory → the mistake (copy-pasting array_intersect function without a dry-run).

Exam tip

Board: Ananya walking through array_intersect function. Dry-run array_intersect() (function). Name the trap: copy-pasting array_intersect function without a dry-run.

Example

<?php
// array_intersect()
$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_intersect(): scores array, print avg, then high marks. Say the output.

Short notes

Defarray_intersect() (function) — Ananya uses it for Ananya walking through array_intersect function in a first job task.
Rulearray_intersect() (function) → one array_intersect function step Ananya can write from memory.
Rememberarray_intersect() (function) + the PHP runtime (a first job task).
Usearray_intersect() (function) in a first job task (Ananya walking through array_intersect function).
Traparray_intersect() (function) — copy-pasting array_intersect function without a dry-run.
Exarray_intersect() (function) → Ananya walking through array_intersect function.

<?php // array_intersect() $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_intersect()

Example

Short notes

Questions

array_intersect()

Example

Short notes

Questions