PHP用數組中的值替換子字符串

Question

我有一個文字說：

$text = "An Elephant is an Elephant but an Elephant is not an Elephant"

我有一個陣列說：

$array = array("First", "Second", "Third", "Fourth", "Fifth", "Sixth", "Seventh", "Eight", "Ninth");

在文中你可以看到有很多出現的“大象”。 我想要做的是我想用數組中的唯一值替換Elephant的出現，結果應該是這樣的：

$result = "An Fifth is an Seventh but an First is not an Fourth"

到目前為止我試過這個：

$arr = array("First", "Second", "Third", "Fourth", "Fifth", "Sixth", "Seventh", "Eight", "Ninth");
$text = "an elephant is an elephant but an elephant is not an elephant";
$array = explode(" ", $text);
$new_arr = array_diff($array, array("elephant"));
$text = implode(" ".$arr[array_rand($arr)]." ", $new_arr);
echo $text;

它輸出這樣的東西：

an First is First an First but First an First is First not First an

我怎么能這樣？

An Fifth is an Seventh but an First is not an Fourth

Answer 1

在這，你為什么不嘗試這個？

$arr = array("First", "Second", "Third", "Fourth", "Fifth", "Sixth", "Seventh", "Eight", "Ninth");
$arrlength = count($arr);
$text = "an elephant is an elephant but an elephant is not an elephant";
$array = explode(" ", $text);
for ($i=0; $i < count($array); $i++) { 
    if ($array[$i]=="elephant")
    {
        $random_key = array_rand($arr, $arrlength);
        $array[$i] = $arr[$random_key[rand(0, $arrlength-1)]];
    }
}
$text = implode(" ", $array);
echo $text;

Answer 2

這應該適合你：

使用preg_replace_callback()您可以簡單地使用array_rand()來始終用數組中的隨機值替換它。

<?php

    $arr = array("First", "Second", "Third", "Fourth", "Fifth", "Sixth", "Seventh", "Eight", "Ninth");
    $text = "an elephant is an elephant but an elephant is not an elephant";

    echo $newText = preg_replace_callback("/\belephant\b/", function($m)use($arr){
        return $arr[array_rand($arr)];
    }, $text);

?>

可能的輸出：

an Seventh is an Third but an First is not an Ninth

Answer 3

適應Rizier123的答案，所以你永遠不會有相同的替代品。 （注意你不需要更換比你陣列中的物品數量更多的物品）

$arr = array("First", "Second", "Third", "Fourth", "Fifth", "Sixth", "Seventh", "Eight", "Ninth");
$text = "an elephant is an elephant but an elephant is not an elephant";

echo $newText = preg_replace_callback("/\belephant\b/", function($m)use(&$arr){
  $item = array_rand($arr);  
  $return = $arr[$item];
  unset($arr[$item]);
  return $return;
}, $text);