Php 确保变量不相等（彩票代码）

因此，我正在参加一个web应用程序开发课程的最后一个项目，我正在创建一个Powerball彩票生成器。要使其工作，不能复制白色球编号。以下是我的代码到目前为止的情况：

<?php

for($x = 1; $x < 6; $x++){

    //set each white ball variable (a through e) to a random number between 1 and 69
    $a = floor((lcg_value() * 69 + 1));
    $b = floor((lcg_value() * 69 + 1));
    $c = floor((lcg_value() * 69 + 1));
    $d = floor((lcg_value() * 69 + 1));
    $e = floor((lcg_value() * 69 + 1));

    //set powerball number variable to a number between 1 and 26
    $f = floor((lcg_value() * 26 + 1));

    //echo all white ball numbers and powerball number
    echo "<b><u>Set #" . $x . "</u></b> - <b>White ball numbers are: </b>" . $a . " , " . $b . " , " . $c . " , " . $d . " , " . $e . ". <b>Powerball Number is </b>" . $f . ".<br />";
};
?>

---

但这实在是太多的工作了，我总是试图找到最有效的方法来编写代码。我不想写太多的代码。如蒙协助，将不胜感激。提前谢谢你

将它们添加到数组中并检查唯一性：

<?php
    for($x = 1; $x < 6; $x++){    
        $unique = false;
        while(!$unique) {
            //set each white ball variable (a through e) to a random number between 1 and 69
            $a = floor((lcg_value() * 69 + 1));
            $b = floor((lcg_value() * 69 + 1));
            $c = floor((lcg_value() * 69 + 1));
            $d = floor((lcg_value() * 69 + 1));
            $e = floor((lcg_value() * 69 + 1));

            $numbers = array($a, $b, $c, $d, $e);
            if(count($numbers) == count(array_unique($numbers)) {
                $unique = true;
            }
        }
        //set powerball number variable to a number between 1 and 26
        $f = floor((lcg_value() * 26 + 1));

        //echo all white ball numbers and powerball number
        echo "<b><u>Set #" . $x . "</u></b> - <b>White ball numbers are: </b>" . $a . " , " . $b . " , " . $c . " , " . $d . " , " . $e . ". <b>Powerball Number is </b>" . $f . ".<br />";
    }

---

您可以通过以下方式生成数字：

$arr = range(1, 69);
shuffle($arr);
$a = $arr[0];
$b = $arr[1];
$c = $arr[2];
$d = $arr[3];
$e = $arr[4];

---

在循环随机生成的数字并动态检查重复的数字时，也可以查看一下

在这里测试它： 我已经将随机数更改为较小的大小，以查看它是否会创建重复项。 但是我没有看到

<?php
$arr =array();
for($x = 1; $x < 6; $x++){

//set each white ball variable (a through e) to a random number between 1 and 69
While (count($arr) != 5){

    $arr[] = floor((lcg_value() * 6 + 1));
    $arr = array_unique($arr);
}

//set powerball number variable to a number between 1 and 26
$f = floor((lcg_value() * 26 + 1));

Var_dump($arr);
//echo all white ball numbers and powerball number
//echo "<b><u>Set #" . $x . "</u></b> - <b>White ball numbers are: </b>" . $a . " , " . $b . " , " . $c . " , " . $d . " , " . $e . ". <b>Powerball Number is </b>" . $f . ".<br />";
};

---

为了尽可能地提高效率，您不希望每次都生成一组新的数字，因此，如果出现重复的数字，您只需要立即重新选择该字母

为此，您可以将元素添加到数组中，并在每个字母后搜索，以确保其为唯一数字。这是通过使用for循环、while循环和check变量来实现的

<?php

for($x = 1; $x < 6; $x++) {
    //set each white ball variable (a through e) to a random number between 1 and 69
    $uniqueNumbers = array();
    $check = true;
    $a = floor((lcg_value() * 69 + 1));
    array_push($uniqueNumbers, $a);
    while ($check) {
        $check = false;
        $b = floor((lcg_value() * 69 + 1));
        foreach ($uniqueNumbers as $element) {
            if ($b == $element) {
                $check = true;
            }
        }
    }
    array_push($uniqueNumbers, $b);
    $check = true;

    while ($check) {
        $check = false;
        $c = floor((lcg_value() * 69 + 1));
        foreach ($uniqueNumbers as $element) {
            if ($c == $element) {
                $check = true;
            }
        }
    }
    array_push($uniqueNumbers, $c);
    $check = true;

    while ($check) {
        $check = false;
        $d = floor((lcg_value() * 69 + 1));
        foreach ($uniqueNumbers as $element) {
            if ($d == $element) {
                $check = true;
            }
        }
    }
    array_push($uniqueNumbers, $d);
    $check = true;

    while ($check) {
        $check = false;
        $e = floor((lcg_value() * 69 + 1));
        foreach ($uniqueNumbers as $element) {
            if ($e == $element) {
                $check = true;
            }
        }
    }
    array_push($uniqueNumbers, $e);

    //set powerball number variable to a number between 1 and 26
    $f = floor((lcg_value() * 26 + 1));

    //echo all white ball numbers and powerball number
    echo "<b><u>Set #" . $x . "</u></b> - <b>White ball numbers are: </b>" . $a . " , " . $b . " , " . $c . " , " . $d . " , " . $e . ". <b>Powerball Number is </b>" . $f . ".<br />";
}

---

下面的代码是6/49加拿大彩票

<body bgcolor="gold"><font size="9"></font>
<pre>
<?php
// Code by bhupinder Deol . modify according to needs
for ($i=0;$i<=10;$i++) {
for ($x=0;$x<=5;$x++) {
    $rand[$x]=rand(1,49);
}
asort($rand);
$result = array_unique($rand);
$count = count($result);
if ($count == 6) {
print_r($rand);
$x=0;
}
else
{
    echo "same numbers in array";
    --$x;
}
}
?>
</pre>
</body>

---

很简单。喜欢！只是一个提示。如果您以这种方式反复重复相同的代码，您可以将其作为一个函数。更干净、更高效的代码。欢迎使用堆栈溢出！请在回答时提供解释，因为独立的代码片段可能不是自解释的，也没有多大帮助。谢谢

<body bgcolor="gold"><font size="9"></font>
<pre>
<?php
// Code by bhupinder Deol . modify according to needs
for ($i=0;$i<=10;$i++) {
for ($x=0;$x<=5;$x++) {
    $rand[$x]=rand(1,49);
}
asort($rand);
$result = array_unique($rand);
$count = count($result);
if ($count == 6) {
print_r($rand);
$x=0;
}
else
{
    echo "same numbers in array";
    --$x;
}
}
?>
</pre>
</body>