PHP · Theory

substr_replace()

Theory

269/352

substr_replace()

substr_replace() is a PHP topic. In plain words you use it for a short substr_replace example in a college portal page. Don’t start with a slogan — start with that picture.

Smallest example: the smallest substr_replace example you can type. Type it, run it, and say what you see. If you can do that from memory, you know substr_replace().

From the example next to this theory — substr_replace(): scores array, print avg, then high marks.

Trap — only saying “substr_replace” with no example. Fix that before you talk about advanced PHP.

Viva — what is substr_replace()? Then show the smallest substr_replace example you can type. Then name the trap.

Exam tip

What is substr_replace()? Show this: the smallest substr_replace example you can type. Trap: only saying “substr_replace” with no example.

Example

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

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

Short notes

Defsubstr_replace() — a short substr_replace example in a college portal page.
Rulethe smallest substr_replace example you can type
Traponly saying “substr_replace” with no example
Usea college portal page

PHP · Theory

substr_replace()

← All stacks

Theory

269/352

substr_replace()

substr_replace() is a PHP topic. In plain words you use it for a short substr_replace example in a college portal page. Don’t start with a slogan — start with that picture.

Smallest example: the smallest substr_replace example you can type. Type it, run it, and say what you see. If you can do that from memory, you know substr_replace().

From the example next to this theory — substr_replace(): scores array, print avg, then high marks.

Trap — only saying “substr_replace” with no example. Fix that before you talk about advanced PHP.

Viva — what is substr_replace()? Then show the smallest substr_replace example you can type. Then name the trap.

Exam tip

What is substr_replace()? Show this: the smallest substr_replace example you can type. Trap: only saying “substr_replace” with no example.

Example

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

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

Short notes

Defsubstr_replace() — a short substr_replace example in a college portal page.
Rulethe smallest substr_replace example you can type
Traponly saying “substr_replace” with no example
Usea college portal page

substr_replace()

Example

Short notes

Questions

substr_replace()

Example

Short notes

Questions