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初めてのPHP
book

初めてのPHP

by David Sklar, 桑村 潤, 廣川 類, 木下 哲也
March 2017
Intermediate to advanced
364 pages
9h 45m
Japanese
O'Reilly Japan, Inc.
Content preview from 初めてのPHP
3.5
 まとめ
53
13. コードブロック:
print "<option>$i</option>"
14. 繰り返し式:
$i++
15. テスト式:
$i <= 10
false
$i
11
カンマで式を区切ると、
for()
ループの初期化式と繰り返し式で複数の式を結合できます。これ
は一般的にループを進める際に複数の変数を変更したいときに使います。 3-19では、変数
$min
$max
に使っています。
3-19
for( )
の中での複数の式
print '<select name="doughnuts">';
for ($min = 1, $max = 10; $min < 50; $min += 10, $max += 10) {
print "<option>$min - $max</option>\n";
}
print '</select>';
ループ内を通るたびに、
$min
$max
10 ずつ増やします。 3-19の出力は次の通りです。
<select name="doughnuts"><option>1 - 10</option>
<option>11 - 20</option>
<option>21 - 30</option>
<option>31 - 40</option>
<option>41 - 50</option>
</select>
3.5
 まとめ
本章では次の内容を取り上げました。
式の真偽値(
true
または
false
)を評価する。
if()
を使って判定する。 ...
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Publisher Resources

ISBN: 9784873117935Other