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HomeBackend DevelopmentPHP TutorialPHP随机插入关键字到有HTML的内容该如何实现?

因为是随机位置,也有可能插入到 

这种地方,这个问题该怎么解决?

能否先剥离HTML标签,随机插入后,再还原呢?希望大家帮帮我。


回复讨论(解决方案)

utf-8下测试没问题

$str = <<<EOF测试,测试测试测试测试测试测试测<p class="test">试测试测试,测试测试测试测试测试测试测试,测试测试测试,测试测</p>试测试测试测试测试测试测试测试测试测试,测试测试测试测试测试测试测试1测试,测试1测试测试1测试测试1测试测试1测试,测试1测试测试1测试测试1测试,测试1测试测试1测试EOF; $insert=array('<a href="javascript:;">链接1</a>','<a href="javascript:;">链接2</a>','<a href="javascript:;">链接3</a>');echo randomInsert($str,$insert);function randomInsert($txt,$insert){	preg_match_all("/[\x01-\x7f]|[\xe0-\xef][\x80-\xbf]{2}/", $txt, $match);	$delay=array();	$add=0;	foreach($match[0] as $k=>$v){		if($v=='<') $add=1;		if($add==1) $delay[]=$k;		if($v=='>') $add=0;	}	$str_arr=$match[0];	$len=count($str_arr);	foreach($insert as $k=>$v){		$insertk=insertK($len-1,$delay);		$str_arr[$insertk].=$insert[$k];	}	echo join('',$str_arr);}function insertK($count,$delay){	$insertk=rand(0,$count);	if(in_array($insertk,$delay)){		$insertk=insertK($count,$delay);	}	return $insertk;}

要有注释就好了

好吧,注释

function randomInsert($txt,$insert){//txt 内容;insert要插入的关键字,可以是链接,数组	//将内容拆分成数组,每个字符都是一个value,英文,中文,符号都算一个,只能在utf-8下中文才能拆分    preg_match_all("/[\x01-\x7f]|[\xe0-\xef][\x80-\xbf]{2}/", $txt, $match);    $delay=array();    $add=0;	//获取不能插入的位置索引号($delay 数组),也就是< > 之间的位置    foreach($match[0] as $k=>$v){        if($v=='<') $add=1;        if($add==1) $delay[]=$k;        if($v=='>') $add=0;    }     $str_arr=$match[0];    $len=count($str_arr);     foreach($insert as $k=>$v){		//获取随机插入的位置索引值        $insertk=insertK($len-1,$delay);		//循环将insert数据 拼接到 随机生成的索引        $str_arr[$insertk].=$insert[$k];    }	//合并插入 关键词后的数据,拼接成一段内容    echo join('',$str_arr);}function insertK($count,$delay){//count 随机索引值范围,也就是内容拆分成数组后的总长度-1;delay 不允许的随机索引值,也就是不能在 < > 之间    $insertk=rand(0,$count);    if(in_array($insertk,$delay)){//索引值不能在 不允许的位置处(也就是< > 之内的索引值)        $insertk=insertK($count,$delay);//递归调用,直到随机插入的索引值不在 < > 这个索引值数组中    }    return $insertk;}

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