PHP · Theory

vsprintf()

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Theory

275/352

vsprintf()

If you can teach vsprintf() using Hello, Asha, you know it. If you only know the heading, you don’t.

Keep vsprintf() small. Sara should finish Hello, Asha in a few lines, not a 40-line dump.

Without vsprintf(), a web page gets messy and Hello, Asha is hard to trust.

Use vsprintf() when Hello, Asha must stay clear. If a simpler PHP step works, use that instead.

vsprintf() trap — missing semicolon. Sara loses marks for that every viva.

vsprintf() is not a lonely heading. Sara ties it to Hello, Asha.

Viva for vsprintf() — what it is → echo / print → the mistake (missing semicolon).

Exam tip

For vsprintf(): definition + a web page + one failure.

Example

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

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

Short notes

Defvsprintf() — Sara uses it for Hello, Asha in a web page.
Rulevsprintf() → echo / print.
Remembervsprintf() + a .php page (a web page).
Usevsprintf() in a web page (Hello, Asha).
Trapvsprintf() — missing semicolon.
Exvsprintf() → Hello, Asha.

PHP · Theory

vsprintf()

← All stacks

Theory

275/352

vsprintf()

If you can teach vsprintf() using Hello, Asha, you know it. If you only know the heading, you don’t.

Keep vsprintf() small. Sara should finish Hello, Asha in a few lines, not a 40-line dump.

Without vsprintf(), a web page gets messy and Hello, Asha is hard to trust.

Use vsprintf() when Hello, Asha must stay clear. If a simpler PHP step works, use that instead.

vsprintf() trap — missing semicolon. Sara loses marks for that every viva.

vsprintf() is not a lonely heading. Sara ties it to Hello, Asha.

Viva for vsprintf() — what it is → echo / print → the mistake (missing semicolon).

Exam tip

For vsprintf(): definition + a web page + one failure.

Example

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

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

Short notes

Defvsprintf() — Sara uses it for Hello, Asha in a web page.
Rulevsprintf() → echo / print.
Remembervsprintf() + a .php page (a web page).
Usevsprintf() in a web page (Hello, Asha).
Trapvsprintf() — missing semicolon.
Exvsprintf() → Hello, Asha.

vsprintf()

Example

Short notes

Questions

vsprintf()

Example

Short notes

Questions