不需要轉(zhuǎn)義字符的：

<?php?

$str_string1 = '甲問(wèn)：“你在哪里學(xué)的PHP？”';

$str_string2 = "乙毫不猶豫地回答：‘當(dāng)然是慕課網(wǎng)咯！’";

$str_string3 = '甲問(wèn)：‘能告訴我網(wǎng)址嗎？’';

$str_string4 = "乙答道：“idcbgp.cn”";

echo $str_string1;

echo "<br />";

echo $str_string2;

echo "<br />";

echo $str_string3;

echo "<br />";

echo $str_string4;

echo "<br />";

?>