我需要将文本表情替换为html图像标签。我整理了以下数据:
private $smile = array(">:]", ":-)", ":)", ":o)", ":]", ":3", ":c)", ":>", "=]", "8)", "=)", ":}", ":^)");
private $laugh = array(">:D", ":-D", ":D", "8-D", "x-D", "X-D", "=-D", "=D", "=-3", "8-)");
private $sad = array(">:[", ":-(", ":(", ":-c", ":c", ":-<", ":-[", ":[", ":{", ">.>", "<.<", ">.<");
private $wink = array(">;]", ";-)", ";)", "*-)", "*)", ";-]", ";]", ";D", ";^)");
private $tongue = array(">:P", ":-P", ":P", "X-P", "x-p", ":-p", ":p", "=p", ":-Þ", ":Þ", ":-b", ":b", "=p", "=P");
private $surprise = array(">:o", ">:O", ":-O", ":O", "°o°", "°O°", ":O", "o_O", "o.O", "8-0");
private $annoyed = array(">:\\", ">:/", ":-/", ":-.", ":\\", "=/", "=\\", ":S");
private $cry = array(":'(", ";'(");
private $t_smile = "<img class=\"smiley\" src=\"/images/emoticons/smile.png\"/>";
private $t_laugh = "<img class=\"smiley\" src=\"/images/emoticons/laugh.png\"/>";
private $t_sad = "<img class=\"smiley\" src=\"/images/emoticons/sad.png\"/>";
private $t_wink = "<img class=\"smiley\" src=\"/images/emoticons/wink.png\"/>";
private $t_tongue = "<img class=\"smiley\" src=\"/images/emoticons/tongue.png\"/>";
private $t_surprise = "<img class=\"smiley\" src=\"/images/emoticons/surprise.png\"/>";
private $t_annoyed = "<img class=\"smiley\" src=\"/images/emoticons/annoyed.png\"/>";
private $t_cry = "<img class=\"smiley\" src=\"/images/emoticons/cry.png\"/>"
我目前只是举个例子:
$str = str_replace($this->laugh, $this->t_laugh, $str);
对于每个组,它都能正常工作,但我需要替换仅在单词周围没有字母或其他数字的情况下发生。换句话说,我需要编译一个包含每个表情符号数组的正则表达式,以便我可以使用preg_replace而不是str_replace。有没有一种简单的方法可以做到这一点,而不是硬编码正则表达式并转义所有必要的字符?
编辑:
此外,我需要匹配和替换出现在字符串开头和结尾的表情符号,因此简单的填充空格技术不足以满足需求。
编辑2:
我按照Mark的示例使用preg_quote从数组中预编译了正则表达式,如下所示:
private $smile = "#(^|\W)(\>\:\]|\:-\)|\:\)|\:o\)|\:\]|\:3|\:c\)|\:\>|\=\]|8\)|\=\)|\:\}|\:\^\))($|\W)#";
private $laugh = "#(^|\W)(\>\:D|\:-D|\:D|8-D|x-D|X-D|\=-D|\=D|\=-3|8-\)|xD|XD|8D|\=3)($|\W)#";
private $sad = "#(^|\W)(\>\:\[|\:-\(|\:\(|\:-c|\:c|\:-\<|\:-\[|\:\[|\:\{|\>\.\>|\<\.\<|\>\.\<)($|\W)#";
private $wink = "#(^|\W)(\>;\]|;-\)|;\)|\*-\)|\*\)|;-\]|;\]|;D|;\^\))($|\W)#";
private $tongue = "#(^|\W)(\>\:P|\:-P|\:P|X-P|x-p|\:-p|\:p|\=p|\:-Þ|\:Þ|\:-b|\:b|\=p|\=P|xp|XP|xP|Xp)($|\W)#";
private $surprise = "#(^|\W)(\>\:o|\>\:O|\:-O|\:O|°o°|°O°|\:O|o_O|o\.O|8-0)($|\W)#";
private $annoyed = "#(^|\W)(\>\:\\|\>\:/|\:-/|\:-\.|\:\\|\=/|\=\\|\:S|\:\/)($|\W)#";
private $cry = "#(^|\W)(\:'\(|;'\()($|\W)#";
与 preg_replace 完美配合!