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substr_replace替换问题

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Jun 20, 2016 pm 12:30 PM

写了一个小程序，想把网站文章中出现的关键词自动加链接，并且当关键词出现多次时只替换一次，与是用到了strpos()及substr_replace实现了此功能，代码如下：

function keywords_autolink($content) {    $keywords=array(            '企业管理书籍' => '<a target="_blank" title="企业管理书籍" href="http://www.12reads.cn/">企业管理书籍</a>',            '企业管理' => '<a target="_blank" title="企业管理书籍" href="http://www.12reads.cn/">企业管理书籍</a>',            '管理学书籍' => '<a target="_blank" title="管理学书籍" href="http://www.12reads.cn/">管理学书籍</a>',            '管理书籍' => '<a target="_blank" title="管理书籍" href="http://www.12reads.cn/">管理书籍</a>',            '管理类书籍' => '<a target="_blank" title="管理类书籍" href="http://www.12reads.cn/">管理类书籍</a>',            '市场营销' => '<a target="_blank" title="市场营销" href="http://www.12reads.cn/category/marketing">市场营销</a>',            '职场' => '<a target="_blank" title="职场" href="http://www.12reads.cn/category/career">职场</a>' );     $keys=array_keys($keywords);    foreach ($keys as $k) {      $pos=strpos($content, $k);      if ($pos !== false) {        // Nothing found        $length=strlen($k);        $content=substr_replace($content, $keywords[$k], $pos, $length);        //$content是文章内容，$keywords[$k]需要替换成的内容，$pos替换开始的位置，$length数出要从开始的位置算起要替换的词有多长。        unset($k);//最后销毁一下哦。    }    }          return $content;  }add_filter('the_content', 'keywords_autolink');

但现在的一个问题是，当同时出现两个需要替换的词时就会乱套，比如，企业管理书籍和企业管理同时出现了，即“企业管理书籍企业管理'”，那么这时候替换结果就成了：

<a href="http://www.12reads.cn/" title="<a target='_blank' title='企业管理' href='http://www.12reads.cn/'>企业管理</a>书籍" target="_blank">企业管理书籍</a>

请问这种问题如何解决呀？大概知道用排序法什么的，可是不太懂，还望前辈们指点下，谢谢了！

回复讨论(解决方案)

function keywords_autolink($content) {    $keywords=array(            '企业管理书籍' => '<a target="_blank" title="企业管理书籍" href="http://www.12reads.cn/">企业管理书籍</a>',            '企业管理' => '<a target="_blank" title="企业管理书籍" href="http://www.12reads.cn/">企业管理书籍</a>',            '管理学书籍' => '<a target="_blank" title="管理学书籍" href="http://www.12reads.cn/">管理学书籍</a>',            '管理书籍' => '<a target="_blank" title="管理书籍" href="http://www.12reads.cn/">管理书籍</a>',            '管理类书籍' => '<a target="_blank" title="管理类书籍" href="http://www.12reads.cn/">管理类书籍</a>',            '市场营销' => '<a target="_blank" title="市场营销" href="http://www.12reads.cn/category/marketing">市场营销</a>',            '职场' => '<a target="_blank" title="职场" href="http://www.12reads.cn/category/career">职场</a>'	);	/*    $keys=array_keys($keywords);    foreach ($keys as $k) {      $pos=strpos($content, $k);      if ($pos !== false) {			// Nothing found			$length=strlen($k);			$content=substr_replace($content, $keywords[$k], $pos, $length);			//$content是文章内容，$keywords[$k]需要替换成的内容，$pos替换开始的位置，$length数出要从开始的位置算起要替换的词有多长。			unset($k);//最后销毁一下哦。	 		}    } 	*/	$keys = array_keys($keywords);	$tmpReplace = [];	foreach($keys as $k=>$v){		$tmpReplace[] = $tmp = '['.$k.']';	}	$content = str_replace($keys,$tmpReplace,$content);	$content = str_replace($tmpReplace,array_values($keywords),$content);		return $content;   }echo keywords_autolink('企业管理书籍哈哈企业管理呵呵企业管理');

function keywords_autolink($content) {    $keywords=array(            '企业管理书籍' => '<a target="_blank" title="企业管理书籍" href="http://www.12reads.cn/">企业管理书籍</a>',            '企业管理' => '<a target="_blank" title="企业管理书籍" href="http://www.12reads.cn/">企业管理书籍</a>',            '管理学书籍' => '<a target="_blank" title="管理学书籍" href="http://www.12reads.cn/">管理学书籍</a>',            '管理书籍' => '<a target="_blank" title="管理书籍" href="http://www.12reads.cn/">管理书籍</a>',            '管理类书籍' => '<a target="_blank" title="管理类书籍" href="http://www.12reads.cn/">管理类书籍</a>',            '市场营销' => '<a target="_blank" title="市场营销" href="http://www.12reads.cn/category/marketing">市场营销</a>',            '职场' => '<a target="_blank" title="职场" href="http://www.12reads.cn/category/career">职场</a>'	);	/*    $keys=array_keys($keywords);    foreach ($keys as $k) {      $pos=strpos($content, $k);      if ($pos !== false) {			// Nothing found			$length=strlen($k);			$content=substr_replace($content, $keywords[$k], $pos, $length);			//$content是文章内容，$keywords[$k]需要替换成的内容，$pos替换开始的位置，$length数出要从开始的位置算起要替换的词有多长。			unset($k);//最后销毁一下哦。	 		}    } 	*/	$keys = array_keys($keywords);	$tmpReplace = [];	foreach($keys as $k=>$v){		$tmpReplace[] = $tmp = '['.$k.']';	}	$content = str_replace($keys,$tmpReplace,$content);	$content = str_replace($tmpReplace,array_values($keywords),$content);		return $content;   }echo keywords_autolink('企业管理书籍哈哈企业管理呵呵企业管理');

谢谢，但这个不行啊，会多次替换。

function keywords_autolink($content) {    $keywords=array(            '企业管理书籍' => '<a target="_blank" title="企业管理书籍" href="http://www.12reads.cn/">企业管理书籍</a>',            '企业管理' => '<a target="_blank" title="企业管理书籍" href="http://www.12reads.cn/">企业管理书籍</a>',            '管理学书籍' => '<a target="_blank" title="管理学书籍" href="http://www.12reads.cn/">管理学书籍</a>',            '管理书籍' => '<a target="_blank" title="管理书籍" href="http://www.12reads.cn/">管理书籍</a>',            '管理类书籍' => '<a target="_blank" title="管理类书籍" href="http://www.12reads.cn/">管理类书籍</a>',            '市场营销' => '<a target="_blank" title="市场营销" href="http://www.12reads.cn/category/marketing">市场营销</a>',            '职场' => '<a target="_blank" title="职场" href="http://www.12reads.cn/category/career">职场</a>'	);	/*    $keys=array_keys($keywords);    foreach ($keys as $k) {      $pos=strpos($content, $k);      if ($pos !== false) {			// Nothing found			$length=strlen($k);			$content=substr_replace($content, $keywords[$k], $pos, $length);			//$content是文章内容，$keywords[$k]需要替换成的内容，$pos替换开始的位置，$length数出要从开始的位置算起要替换的词有多长。			unset($k);//最后销毁一下哦。	 		}    } 	*/	$keys = array_keys($keywords);	$tmpReplace = [];	foreach($keys as $k=>$v){		$tmpReplace[] = $tmp = '['.$k.']';		$tmpfind = '/'.$v.'/';		$content = preg_replace($tmpfind,$tmp,$content,1);	}		$content = str_replace($tmpReplace,array_values($keywords),$content);        	return $content;   }echo keywords_autolink('企业管理书籍哈哈企业管理呵呵企业管理');

谢谢，上面是替换了一次，但企业管理书籍被替换了多次，并且企业管理没有被替换。

看看你的$keywords
第一个企业管理书籍替换为带连接的企业管理书籍
第一个企业管理也替换为带连接的企业管理书籍
第二个企业管理没有替换

怎么不对了

我看错了，代码正常，谢谢，本贴已结，可不可以再看看这个 http://bbs.csdn.net/topics/391942890

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