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PHP一些常用的函数

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]); }

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; } 

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]; }

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 = preg_replace("/[\r\n]{1,}/isU","

    \r\n",$txt); return $txt; }

清除HTML标记 

function clearHtml($str){ $str = str_replace('','>',$str); return $str; }

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