我正在尝试用另一个引号(’(替换单引号('(，但我似乎无法正常工作。另外，我怎样才能在多个字符串上工作($text, $title, $notice)？
输入：不要
输出：不要
我正在尝试这个：
$text = str_replace(array("'",'"'), array('’'), $text);
$text = htmlentities(str_replace(array('"', "'"), '’', $text);
$text = htmlentities(str_replace(array('"', "'"), '’', $_POST['text']));
$text = str_replace("'" ,"’",$text);
$text = str_replace("'" ,"’",$text);
$text = str_replace(array("'"), "’", $text);
$text = str_replace(array("''", "'", """), "’", htmlspecialchars($text));
$text = str_replace(array('''', '"'), '’', $text);
$text = str_replace(chr(39), chr(146), $text);
$text = str_replace("'", """, $text);
这些都行不通。
当您使用数组作为替换时，请提供与针头一样多的替换。否则使用简单的字符串。
<?php
$text = 'Peter''s cat''s name is "Tom".';
$text = str_replace(array("'",'"'), '’', $text);
echo $text;
$text = 'Peter''s cat''s name is "Tom".';
$text = str_replace(array("'",'"'), array('’', '`'), $text);
echo $text;
?>
要对多个变量执行该任务，您可以执行
<?php
$text = 'Peter''s cat''s name is "Tom".';
$title = 'Peter''s cat''s name is "Tom".';
$notice = 'Peter''s cat''s name is "Tom".';
foreach([&$text, &$title, &$notice] as &$item)
$item = str_replace(array("'",'"'), '’', $item);
echo "text: $text<br>title: $title<br>notice: $notice";
?>
我尝试使用preg_replace()，第一次它运行良好：
$text = "Someone told me about a 'bacon and cheese sandwich'";
$text = preg_replace("#''#", '’', $text);
echo $text;
输出
Someone told me about a ’bacon and cheese sandwich’
试一试。