PHP采集程序常用函数分享

分享一些php采集程序中的常用函数，省得以后满地找了，想用时来这里看看，哈哈。

//当前的脚本网址 

function get_php_url(){ 

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; 

} 

//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; 

} 

//去除HTML标记 

function Text2Html($txt){ 

$txt = str_replace(" ","　",$txt); 

$txt = str_replace("<","<",$txt); 

$txt = str_replace(">",">",$txt); 

$txt = preg_replace("/[\r\n]{1,}/isU","<br/>\r\n",$txt); 

return $txt; 

} // www.jbxue.com

//清除HTML标记 

function ClearHtml($str){ 

$str = str_replace('<','<',$str); 

$str = str_replace('>','>',$str); 

return $str; 

} 

//相对路径转化成绝对路径 

function relative_to_absolute($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; 

} 

//取得所有链接 

function get_all_url($code){ 

preg_match_all('/<a\s+href=["|\']?([^>"\' ]+)["|\']?\s*[^>]*>([^>]+)<\/a>/i',$code,$arr); 

return array('name'=>$arr[2],'url'=>$arr[1]); 

} 

//获取指定标记中的内容 

function get_tag_data($str, $start, $end){ 

if ( $start == '' || $end == '' ){ 

return; 

} 

$str = explode($start, $str); 

$str = explode($end, $str[1]); 

return $str[0]; 

} 

//HTML表格的每行转为CSV格式数组 

function get_tr_array($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 

$table = preg_replace("'([\r\n])[\s]+'","",$table); 

$table = str_replace(" ","",$table); 

$table = str_replace(" ","",$table); 

$table = explode(",{tr}",$table); 

array_pop($table); 

return $table; 

} 

//将HTML表格的每行每列转为数组，采集表格数据 

function get_td_array($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 

$table = preg_replace("'([\r\n])[\s]+'","",$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; 

} // www.jbxue.com

return $td_array; 

} 

//返回字符串中的所有单词 $distinct=true 去除重复 

function split_en_str($str,$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]; 

}