只打印0
具体个数由输入的参数n决定
如n=5就打印00000
<?php $n = $_GET["n"]; for ($i=0; $i < $n; $i++) { echo "0"; }?>
打印一行 0101010101010101010101
具体个数由输入的参数n决定
如test.php?n=3打印010
<?php $n = $_GET["n"]; for ($i=0; $i < $n; $i++) { if ($i % 2 ==0) { echo "0"; } else{ echo "1"; } }?>
实现1 00 111 0000 11111
for if 实现
<?phpfor ($i = 0; $i < 10; $i++) { for ($j = 0; $j <= $i; $j++) { if ($i % 2 == 0) { echo "0"; } else { echo "1"; } } echo "<br/>";}?>
for switch 实现
<?phpfor ($i = 0; $i < 10; $i++) { for ($j = 0; $j <= $i; $j++) { switch ($j % 2) { case "0": echo "0"; break; case "1": echo "1"; break; } } echo "<br/>";}?>
while if 实现
while switch 实现
<?php$i = 0;while ($i < 10) { $j = 0; while ($j <= $i) { switch ($i % 2) { case 0: echo "0"; break; case 1: echo "1"; break; } $j++; } echo "<br/>"; $i++;}?>
实现0 01 010 0101……
实现0 01 012 0123 3210 210 10 0
做个计算器
如test.php?a=1&b=2&operator=jia输出3
如test.php?a=5&b=2&operator=jian输出3
如test.php?a=2&b=5&operator=cheng输出10
如test.php?a=6&b=3&operator=chu输出2
<?php $a = $_GET["a"]; $b = $_GET["b"]; $operator = $_GET["operator"]; function calculate($a,$b,$operator) { switch ($operator) { case "jia": $result = $a + $b; return $result; break; case "jian": $result = $a - $b; return $result; break; case "cheng": $result = $a * $b; return $result; break; case "chu": $result = $a / $b; return $result; break; } } echo calculate($a,$b,$operator);?>
以上所述就是本文的全部内容了,希望大家能够喜欢。