投稿者: chosuke

<?php

$n = 5.6283;

// echo ceil($n) . PHP_EOL; //6
// echo floor($n) . PHP_EOL; //5
// echo round($n) . PHP_EOL; // 6
// echo round($n, 2) . PHP_EOL; //6

// echo mt_rand(1,6) . PHP_EOL;

// echo max(3,9,4) . PHP_EOL;
// echo min(3,9,4) . PHP_EOL;

echo M_PI . PHP_EOL;
echo M_SQRT2 . PHP_EOL;

https://techplay.jp/column/474

<?php

$input = ‘ こんにちは ‘;
$input = trim($input);

echo mb_strlen($input) . PHP_EOL; //5
echo mb_strpos($input, ‘に’) . PHP_EOL; //2

$input = str_replace(‘にち’, ‘ばん’, $input); //こんばんは
echo $input . PHP_EOL;

<?php

$name = ‘Apple’;
$score = 32.246;

//$info = “[$name][$score]”;
//echo $info . PHP_EOL;

//$info = sprintf(“[%15s][%10.2f]”, $name, $score);
//echo $info . PHP_EOL;

//$info = sprintf(“[%-15s][%10.2f]”, $name, $score);
//echo $info . PHP_EOL;

printf(“[%-15s][%10.2f]” . PHP_EOL, $name, $score);

<?php

function getStats(…$numbers)
{
$total = 0;
foreach ($numbers as $number) {
$total += $number;
}
return [$total, $total / count($numbers)];
}

//print_r(getStats(1,3,5));

//list($sum, $average) = getStats(1,3,5);
[$sum, $average] = getStats(1,3,5);

echo $sum . PHP_EOL;
echo $average .PHP_EOL;

<?php

//function sum($a, $b, $c)
function sum(…$numbers)
{
//return $a + $b + $c;
$total = 0;
foreach($numbers as $number){
$total += $number;
}
return $total;
}

echo sum(1,3,5) . PHP_EOL;
echo sum(4,2,5,1) . PHP_EOL;

<?php

$moreScores = [
55,
72,
‘perfect’,
[90, 42,88],
];

$scores = [
90,
40,
…$moreScores,
100,
];

//print_r($scores);

echo $scores[5][2] . PHP_EOL;

<?php

$scores = [
‘first’ => 90,
‘second’ => 40,
‘third’ => 100,
];

//foreach($scores as $value){
//foreach($scores as $score){
// echo $score . PHP_EOL;
//}

foreach($scores as $key => $score){
echo $key .’ – ‘. $score . PHP_EOL;
}

<?php

//$score1 = 90;
//$score2 = 40;
//$score3 = 100;

$scores = [
90,
40,
100
];

$scores[1] = 60;
echo $scores[1] . PHP_EOL;