php 流程控制

$a = 0;

switch ($a){ 
  case $a >= 0:
  echo 0;
  break;
  case $a >=10:
  echo 1;
  break;
  default:
  echo 2;
  break;
}

exit();

if (condition) {
  # code...
}

if (condition) {
  # code...
} else {
  # code...
}

switch (variable) {
  case 'value':
    # code...
    break;

  default:
    # code...
    break;
}

while ($a <= 10) {
  # code...
}

do {
  # code...
} while ($a <= 10);

for ($i=0; $i < ; $i++) {
  # code...
}

foreach ($variable as $key => $value) {
  # code...
}

goto a;
echo 'Foo';

a:
echo 'Bar';

// 结果 Bar