Question

我有一个函数用数组替换每个字符：

function z3($str){
  $text=$str;
  $sr = array(
    'a' => array('A'),
    'b' => array('B'),
    ' ' => array(' ')
  ); 
  for ($i = 0, $len = strlen($text); $i < $len; $i++) { 
    $news .= $sr[$text[$i]][@array_rand($sr[$text[$i]])];   
  } 
  $nn=$news; 
  return $nn;
}
echo z3("aaa");

我需要开发它，如果角色（a）在最后一个单词中，并且在它是空格之后，我想向它添加（'s）。让我解释一下：

$str = "aaa aaa aaa";
echo z3($str);

我需要输出为AAA's AAA's AAA。

Answer 1

很难理解你的问题，但如果你只想在最后一个字符为 a 的单词中添加撇号，你需要将除的之外的所有内容都大写你不想让最后一句话占有欲......

function z3($str) {

  $parts = explode(' ', $str);

  for ($i=0; $i < count($parts); $i++) {
    $parts[$i] = strtoupper($parts[$i]);
    if (substr($parts[$i], -1) == 'A') {
      $parts[$i] = $parts[$i] . "'s";
    }
  }

  $str = implode(' ', $parts);
  return rtrim($str, "'s");
}

$str = "aaa aaa aaa";
echo z3($str); // outputs AAA's AAA's AAA

Answer 2

str_replace(" ", "'s ", trim($str))

Answer 3

function z3($str) {
    $sr = array(
        'a' => array('A'),
        'b' => array('B'),
        ' ' => array(' ')
    );

    $nn = '';

    for ($i = 0, $len = strlen($str); $i < $len; $i++) {
        if($str[$i] == ' ' && isset($str[$i-1]) && $str[$i-1] == 'a')
            $nn.= "'s";
        $nn.= $sr[$str[$i]][@array_rand($sr[$str[$i]])];   
    }

    return $nn;
}

$str = "aaa aaa aaa";
echo z3($str);

Answer 4

你想（1）将每个字符更改为$ sr数组中的相应值，（2）如果单词包含'a'而不是最后一个字，则在单词的末尾添加“'s”

尝试：

    function z3(&$str) {
        $sr = array(
            'a' => array('A'),
            'b' => array('B'),
            ' ' => array(' ')
        );
        $words = explode(' ', $str); // split str into words
        $numwords = count($words);
        foreach ($words as $index => &$word) { // run through each word
            $chars = preg_split('//', $str, -1, PREG_SPLIT_NO_EMPTY); // split word into characters
            foreach ($chars as &$char) { // run through each character
                if (array_key_exists($char, $sr)) {
                    $char = $sr[$char]; // if there is a replacement in $sr array, set $char to its value
                }
            }
            if ($index < $numwords && in_array($sr['a'], $chars) { // if this is not the last word and it contains an 'a', append characters ' and s
                $chars += array("'", "s");
            }
            $word = implode('', $chars); // pull the words back together
        }
        $str = implode(' ', $words); // pull the string back together
    }

    $str = 'aaa aaa aaa';
    z3($str);
    echo $str; // echoes AAA's AAA's AAA

Answer 5

function z3($str) {
  $patt=str_split("ab");
  $repl=str_split("AB");
  return preg_replace("/ /", "'s ", str_replace($patt, $repl, $str));
}

$str="bar tab";
echo z3($str);

>>> BAr's tAB

获取字符串中的最后一个字符

5 个答案: