PHP · Theory

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Theory

7/352

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print 'Hello'; also writes to the page. It always returns 1 so it can sit in an expression. Teams still write echo. Know both for MCQs.

Trap — treating print as a function with two arguments like echo $a, $b — print takes one argument.

Exam tip

print 'Hello'; — one argument. echo is more common.

Example

<?php
// Print
$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";
}

Print: scores array, print avg, then high marks. Say the output.

Short notes

Defprint outputs one value and returns 1.
RulePrefer echo in real code.
Trapprint a, b like echo.

PHP · Theory

Print

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Theory

7/352

Print

print 'Hello'; also writes to the page. It always returns 1 so it can sit in an expression. Teams still write echo. Know both for MCQs.

Trap — treating print as a function with two arguments like echo $a, $b — print takes one argument.

Exam tip

print 'Hello'; — one argument. echo is more common.

Example

<?php
// Print
$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";
}

Print: scores array, print avg, then high marks. Say the output.

Short notes

Defprint outputs one value and returns 1.
RulePrefer echo in real code.
Trapprint a, b like echo.

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