Question

我想使用for循环来创建多个汽车......他们的名字是$var1到$var15。我怎么做？我正在做$$var.$i，但它没有用。

for($i=1; $i <= 15; $i++){
   $$var.$i = 'this is the content of var'.$i;
}

Answer 1

如果你想这样做，那么你必须做${$var . $i}。现在它被解释为($$var).$i。

然而，这是非常糟糕的风格。相反，您应该使用数组^{[php docs]}来存储值：

$var = array();
for($i=1; $i <= 15; $i++){
    $var[$i] = 'This is the content of $var['.$i.'].';
}

var_export($var);

输出：

array (
  1 => 'This is the content of $var[1].',
  2 => 'This is the content of $var[2].',
  3 => 'This is the content of $var[3].',
  4 => 'This is the content of $var[4].',
  5 => 'This is the content of $var[5].',
  6 => 'This is the content of $var[6].',
  7 => 'This is the content of $var[7].',
  8 => 'This is the content of $var[8].',
  9 => 'This is the content of $var[9].',
  10 => 'This is the content of $var[10].',
  11 => 'This is the content of $var[11].',
  12 => 'This is the content of $var[12].',
  13 => 'This is the content of $var[13].',
  14 => 'This is the content of $var[14].',
  15 => 'This is the content of $var[15].',
)

这更有效，而且通常更安全。

我如何命名这些php变量

1 个答案: