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array_intersect_key()

Theory

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array_intersect_key()

array_intersect_key() (function) is simple if you keep it on paper. Meera uses it for array_intersect_key function on Meera's board in a campus project.

Do array_intersect_key() (function) once by hand. one array_intersect_key function step Meera can write from memory. Change one input. Say the new result out loud.

Without array_intersect_key() (function), a campus project gets messy and array_intersect_key function on Meera's board is hard to trust.

Use array_intersect_key() (function) when array_intersect_key function on Meera's board must stay clear. If a simpler PHP step works, use that instead.

array_intersect_key() (function) trap: only reciting the name of array_intersect_key function. Meera loses marks for that every viva.

Place array_intersect_key() (function) next to nearby PHP work — one array_intersect_key function step Meera can write from memory is the link.

Close array_intersect_key() (function) with: “If I skip it, array_intersect_key function on Meera's board goes wrong like this: only reciting the name of array_intersect_key function.”

Exam tip

Board: array_intersect_key function on Meera's board. Dry-run array_intersect_key() (function). Name the trap: only reciting the name of array_intersect_key function.

Example

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

Short notes

Defarray_intersect_key() (function) — Meera uses it for array_intersect_key function on Meera's board in a campus project.
Rulearray_intersect_key() (function) → one array_intersect_key function step Meera can write from memory.
Rememberarray_intersect_key() (function) + the PHP runtime (a campus project).
Usearray_intersect_key() (function) in a campus project (array_intersect_key function on Meera's board).
Traparray_intersect_key() (function) — only reciting the name of array_intersect_key function.
Exarray_intersect_key() (function) → array_intersect_key function on Meera's board.

<?php // array_intersect_key() $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_key()

Example

Short notes

Questions

array_intersect_key()

Example

Short notes

Questions