我如何隨機化一個字符串？

Question

我相信這是一個容易的，但什麼是隨機化字符串文本的最佳方法？是這樣的：

$content = "{hey|hi|hello there}! {i am|i'm} {good|great}!"; 

我怎樣才能使輸出這樣的：

哎！我很好！
你好！我很好！
等。

Answer 1

也許你可以試試：

$content = "{hey|hi|hello there}! {i am|i'm} {good|great}!"; 

$randomOutput = preg_replace('/(\{.*?\})/s', function($matches) { 
    $possibilities = (array) explode('|', trim($matches[0], '{}')); 

    return $possibilities[array_rand($possibilities)]; 
}, $content); 

---

版本的PHP < 5.3

function randomOutputCallback($matches) { 
    $possibilities = (array) explode('|', trim($matches[0], '{}')); 

    return $possibilities[array_rand($possibilities)]; 
} 

$content = "{hey|hi|hello there}! {i am|i'm} {good|great}!"; 

$randomOutput = preg_replace('/(\{.*?\})/s', 'randomOutputCallback', $content); 

Answer 2

如果您使用數組：

$greeting = array("hey","hi","hello there"); 
$suffix = array("good","great"); 

$randGreeting = $greeting[rand(0, sizeof($greeting))]; 
$randSuffix = $suffix[rand(0,(sizeof($suffix)))]; 

echo "$randGreeting, I'm $randSuffix!"; 

當然，你也可以寫的最後一行是：

echo $randomGreeting . ", I'm " . $randSuffix . "!"; 

Answer 3

我會安排在一個陣列...像This Live Demo的元素。

<?php 

$responseText = array(
    array("hey","hi","hello there"), 
    "! ", 
    array("i am", "i'm"), 
    " ", 
    array("good", "great"), 
    "! " 
); 

echo randomResponse($responseText); 

function randomResponse($array){ 
    $result=''; 
    foreach ($array as $item){ 
     if (is_array($item)) 
      $result.= $item[rand(0, count($item)-1)]; 
     else 
      $result.= $item; 
    } 
    return ($result); 
} 
?>