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PHP · Theory

in_array()

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Theory

125/352

in_array()

If you can teach in_array() (function) using in_array function on Asha's board, you know it. If you only know the heading, you don’t.

in_array() (function) on the board: one in_array function step Asha can write from memory. Then say what in_array function on Asha's board looks like after.

Without in_array() (function), a first job task gets messy and in_array function on Asha's board is hard to trust.

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

in_array() (function) miss — only reciting the name of in_array function. Fix it before you talk about advanced PHP.

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

Viva for in_array() (function): what it is → one in_array function step Asha can write from memory → the mistake (only reciting the name of in_array function).

Exam tip

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

Example

<?php
// in_array()
$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";
}

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

Short notes

  • Defin_array() (function) — Asha uses it for in_array function on Asha's board in a first job task.
  • Rulein_array() (function) → one in_array function step Asha can write from memory.
  • Rememberin_array() (function) + Apache/Nginx (a first job task).
  • Usein_array() (function) in a first job task (in_array function on Asha's board).
  • Trapin_array() (function) — only reciting the name of in_array function.
  • Exin_array() (function) → in_array function on Asha's board.

Questions

1

What is in_array() (function)? Teach it with in_array function on Asha's board.

2

Name one PHP screen/job that needs in_array() (function).

3

Viva: one wrong answer people give for in_array() (function).

4

Show in_array() (function) in Apache/Nginx terms — three lines max.

Previous← Array flip()Nextarray_intersect_assoc() →
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