PHP · Theory

stristr()

Theory

248/352

stristr()

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

stristr() on the board — one stristr step Sara can write from memory. Then say what a stristr dry-run looks like after.

Without stristr(), a viva board gets messy and a stristr dry-run is hard to trust.

stristr() shows up in a viva board. Name a stristr dry-run, not “a real-world scenario”.

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

stristr() is not a lonely heading. Sara ties it to a stristr dry-run.

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

Exam tip

Say stristr() in one breath, then one stristr step Sara can write from memory, then only reciting the name of stristr.

Example

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

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

Short notes

Defstristr() — Sara uses it for a stristr dry-run in a viva board.
Rulestristr() → one stristr step Sara can write from memory.
Rememberstristr() + a .php page (a viva board).
Usestristr() in a viva board (a stristr dry-run).
Trapstristr() — only reciting the name of stristr.
Exstristr() → a stristr dry-run.

PHP · Theory

stristr()

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Theory

248/352

stristr()

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

stristr() on the board — one stristr step Sara can write from memory. Then say what a stristr dry-run looks like after.

Without stristr(), a viva board gets messy and a stristr dry-run is hard to trust.

stristr() shows up in a viva board. Name a stristr dry-run, not “a real-world scenario”.

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

stristr() is not a lonely heading. Sara ties it to a stristr dry-run.

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

Exam tip

Say stristr() in one breath, then one stristr step Sara can write from memory, then only reciting the name of stristr.

Example

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

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

Short notes

Defstristr() — Sara uses it for a stristr dry-run in a viva board.
Rulestristr() → one stristr step Sara can write from memory.
Rememberstristr() + a .php page (a viva board).
Usestristr() in a viva board (a stristr dry-run).
Trapstristr() — only reciting the name of stristr.
Exstristr() → a stristr dry-run.

stristr()

Example

Short notes

Questions

stristr()

Example

Short notes

Questions