PHP 采集程序 常用函数

　　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 $txt;
}
//清除HTML标记
function ClearHtml($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(/(httphttpsftp):\/\//, $feed_url, $protocol);
$server_url = preg_replace(/(httphttpsftpnews):\/\//, , $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;
}
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];
}