必须从某些字符串添加prevent美元符号

问题描述

我有这个数组;

Array (
       [0] => (
       [1] => he
       [2] => +
       [3] => is
       [4] => +
       [5] => genius
       [6] => )
       [7] => *
       [8] => and
       [9] => /
       [10] => clever )

这是possibe把美元符号在阵列中的每个字母数字字符串之前，该链接是在这里：
Adding在阵列中的每个字符串之前，美元符号？

现在，是否有可能prevent美元符号被添加到一个特定的字符串，例如，如果有一句话她，谁，或者他们在阵列比不应该被添加到这些字符串美元符号？

Now, Is it possible to prevent dollar sign to be added to a certain strings, for example if there is a word she, who or they in array than dollar sign should not be added to these strings?

推荐答案

去了你的旧code，我修改的：

Going off of your old code, I amended it:

$noappend = array("she","who","they"); // add more

// $arr is your array as defined in your question
foreach ($arr as &$val) {
  //OR if (ctype_alpha($val[0])) {
  if (ctype_alpha($val) && !in_array($val, $noappend)) {
    $val = '$' . $val;
  }
}

var_dump($arr);

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