php验证码程序_PHP采集程序常用的采集函数收藏

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这几天关注了一下PHP的采集程序，才发现用PHP采集内容是这么方便，把经常用到的采集函数在这里总结一下，方便以后使用!

获取所有链接内容和地址
function getAllURL($code){
preg_match_all("/"" ]+)["|"]?s*[^>]*>([^>]+)/i",$code,$arr);
return array("name"=>$arr[2],"url"=>$arr[1]);
}

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];
}

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;
}

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);
$txt = preg_replace("/[rn]{1,}/isU","
rn",$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 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;
}

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];
}

HTML表格的每行转为CSV格式数组
function getTrArray($table) {
$table = preg_replace(""]*?>"si",""",$table);
$table = str_replace("","",",$table);
$table = str_replace("","{tr}",$table);
//去掉 HTML 标记
$table = preg_replace(""<[/!]*?[^<>]*?>"si","",$table);
//去掉空白字符
$table = preg_replace(""([rn])[s]+"","",$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 getTdArray($table) {
$table = preg_replace(""]*?>"si","",$table);
$table = preg_replace(""]*?>"si","",$table);
$table = preg_replace(""]*?>"si","",$table);
$table = str_replace("","{tr}",$table);
$table = str_replace("","{td}",$table);
//去掉 HTML 标记
$table = preg_replace(""<[/!]*?[^<>]*?>"si","",$table);
//去掉空白字符
$table = preg_replace(""([rn])[s]+"","",$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 $distinct=true 去除重复
function splitEnStr($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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