20200512-php-baseclass-4

1_loop.php

<?php
//第一次for教學，三個函數分別為起始值，條件，最後執行動作
for ($i = 0; $i < 10; $i++) {
	echo $i;
}
?>
<hr />
<?php
/* 
		邏輯思考：試著印出
		1
		4
		7
		10
	*/
for ($j = 1; $j <= 10; $j += 3)	echo $j . '<br/>';
?>
<hr />
<?php
/* 
		練習：產生★*51橫向排列顏色漸變
		第一個★色碼rgb(0,0,255)
		最後個★色碼rgb(255,0,0)
	*/
for ($k = 0; $k < 256; $k += 5)
	echo "<span style='color:rgb(" . $k . ",0," . (255 - $k) . ")'>★</span>";
?>
<hr />
<?php
/*
		question: 99乘法表
	*/
//做法1,span+br (橫向列印+換行)
for ($m = 1; $m < 10; $m++) {
	for ($n = 1; $n < 10; $n++) {
		echo "<span style='display:inline-block;width:70px'>" . $n . "*" . $m . "=" . ($n * $m) . "</span>";
	}
	echo "<br/>";
}
?>
<hr />
<table border='1'>
	<tr>
		<?php //作法2,table (垂直列印+換行)
		for ($m = 1; $m < 10; $m++) {
			echo "<td width='75'>";
			for ($n = 1; $n < 10; $n++)
				echo $m . "*" . $n . "=" . ($m * $n) . "<br/>";
			echo "</td>";
		}
		?>
	</tr>
</table>
<hr />
<?php
//做法3，將做法1配上顏色漸層
$clr = 0;
for ($m = 1; $m < 10; $m++) {
	for ($n = 1; $n < 10; $n++) {
		echo "<span style='display:inline-block;width:70px;color:rgb(" . $clr . ",0," . (255 - $clr) . ")'>" . $n . "X" . $m . "=" . ($n * $m) . "</span>";
		$clr += 5;
	}
	echo "<br/>";
}
?>
<hr />
<?php
//while 有分普通while跟do while，跟for比起來while只有條件
$i = 0;
while ($i < 10) {
	echo $i;
	$i++;
}
?>
<hr />
<?php
$count = 5;
do {
	echo $count;
	$count--;
} while ($count != 0);
?>
<hr />
<div style="text-align:center;width:200px">
	<?php
	/*
____★
___★★★
__★★★★★
_★★★★★★★
★★★★★★★★★
*/
	for ($i = 1; $i < 10; $i += 2) { //$i=1,3,5,7,9 pre-for
		for ($j = 1; $j <= $i; $j++) {
			echo "★";
		}
		echo "<br/>";
	};
	?>
</div>
<hr/>
<div style="text-align:center;width:200px;background-color:black;">
	<?php
	for ($i = 1; $i < 10; $i += 2) { //$i=1,3,5,7,9 pre-for
		for ($j = 1; $j <= $i; $j++) {
			$clr=rand(1,100);
			if($clr<11) echo "<span style='color:red'>★</span>";
			elseif($clr<31) echo "<span style='color:yellow'>★</span>";
			elseif($clr<61) echo "<span style='color:pink'>★</span>";
			else echo "<span style='color:white;background-color:black'>★</span>";
		}
		echo "<br/>";
	};
	?>
</div>