PHP常用采集函数总结
1、获取所有链接内容和地址
function getAllURL($code){ preg_match_all('/<as+href=["|']?([^>"']+)["|']?s*[^>]*>([^>]+)</a>/i',$code,$arr); return array('name'=>$arr[2],'url'=>$arr[1]); }
2、获取所有的图片地址
function getImgSrc($code){ $reg="/]*src="(http://(.+)/(.+).(jpg|gif|bmp|bnp|png))"/isU"; preg_match_all($reg,$code,$img_array,PREG_PATTERN_ORDER); return $img_array[1]; }
3、当前的脚本网址
function getSelfURL(){ if(!empty($_SERVER["REQUEST_URI"])){ $scriptName = $_SERVER["REQUEST_URI"]; $nowurl = $scriptName; }else{ $scriptName = $_SERVER["PHP_SELF"]; if(empty($_SERVER["QUERY_STRING"]))$nowurl=$scriptName; else$nowurl=$scriptName."?".$_SERVER["QUERY_STRING"]; } return $nowurl; }
4、把全角数字转为半角数字
function getAlabNum($fnum){ $nums=array("0","1","2","3","4","5","6","7","8","9"); $fnums = "0123456789"; for($i=0;$i<=9;$i++)$fnum=str_replace($nums[$i],$fnums[$i],$fnum); $fnum = ereg_replace("[^0-9.]|^0{1,}","",$fnum); if($fnum=="") $fnum=0; return $fnum; }
5、去除HTML标记
function text2Html($txt){ $txt = str_replace(" "," ",$txt); $txt = str_replace("<","<",$txt); $txt = str_replace(">",">",$txt); $txt = preg_replace("/[ ]{1,}/isU","<br/> ",$txt); return $txt; }
6、清除HTML标记
function clearHtml($str){ $str = str_replace('<','<',$str); $str = str_replace('>','>',$str); return $str; }
7、相对路径转化成绝对路径
function relative2Absolute($content, $feed_url) { preg_match('/(http|https|ftp):///',$feed_url, $protocol); $server_url = preg_replace("/(http|https|ftp|news):///", "", $feed_url); $server_url = preg_replace("//.*/", "", $server_url); if ($server_url == '') { return $content; } if (isset($protocol[0])) { $new_content=preg_replace('/href="//', 'href="'.$protocol[0].$server_url.'/', $content); $new_content=preg_replace('/src="//', 'src="'.$protocol[0].$server_url.'/', $new_content); } else { $new_content = $content; } return $new_content; }
8、获取指定标记中的内容
function getTagData($str, $start, $end){ if ( $start == '' || $end == '' ){ return; } $str = explode($start, $str); $str = explode($end, $str[1]); return $str[0]; }
9、HTML表格的每行转为CSV格式数组
function getTrArray($table) { $table = preg_replace("'<td[^>]*?>'si",'"',$table); $table = str_replace("</td>",'",',$table); $table = str_replace("</tr>","{tr}",$table); //去掉 HTML 标记 $table = preg_replace("'<[/!]*?[^<>]*?>'si","",$table); //去掉空白字符 $table = preg_replace("'([ ])[s]+'","",$table); $table = str_replace(" ","",$table); $table = str_replace(" ","",$table); $table = explode(",{tr}",$table); array_pop($table); return $table; }
10、将HTML表格的每行每列转为数组,采集表格数据
function getTdArray($table) { $table = preg_replace("'<table[^>]*?>'si","",$table); $table = preg_replace("'<tr[^>]*?>'si","",$table); $table = preg_replace("'<td[^>]*?>'si","",$table); $table = str_replace("</tr>","{tr}",$table); $table = str_replace("</td>","{td}",$table); //去掉 HTML 标记 $table = preg_replace("'<[/!]*?[^<>]*?>'si","",$table); //去掉空白字符 $table = preg_replace("'([ ])[s]+'","",$table); $table = str_replace(" ","",$table); $table = str_replace(" ","",$table); $table = explode('{tr}', $table); array_pop($table); foreach ($table as $key=>$tr) { $td = explode('{td}', $tr); array_pop($td); $td_array[] = $td; } return $td_array; }
11、返回字符串中的所有单词 $distinct=true 去除重复
function splitEnStr($str,$distinct=true) { preg_match_all('/([a-zA-Z]+)/',$str,$match); if ($distinct == true) { $match[1] = array_unique($match[1]); } sort($match[1]); return $match[1]; }
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