PHP常用技巧总结,php总结_PHP教程
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2022-06-10 08:11:59
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PHP常用技巧总结,php总结
PHP文件读取函式 //文件读取函式 function PHP_Read($file_name) { $fd=fopen($file_name,r); while($bufline=fgets($fd, 4096)){ $buf.=$bufline; } fclose($fd); return $buf; } ?> 文件写入函式 //文件写入函式 function PHP_Write($file_name,$data,$method=”w”) { $filenum=@fopen($file_name,$method); flock($filenum,LOCK_EX); $file_data=fwrite($filenum,$data); fclose($filenum); return $file_data; } ?> 静态页面生成函式 //静态页面生成函式 function phptohtm($filefrom,$fileto,$u2u=1){ if($u2u==1){ $data=PHP_Read($filefrom); }else{ $data=$filefrom; } PHP_Write($fileto,$data); return true; } ?> 指定条件信息数量检索函式 //指定条件信息数量检索函式 function rec_exist($table,$where){ $query=”select count(*) as num from $table “.$where; $result=mysql_query($query) or die(nerror(1)); $rowcount=mysql_fetch_array($result); $num=$rowcount["num"]; if ($num==0){ return false; } return $num; } ?> 目录删除函式 //目录删除函式 function del_DIR($directory){ $mydir=dir($directory); while($file=$mydir->read()){ if((is_dir(“$directory/$file”)) AND ($file!=”.”) AND ($file!=”..”)){ del_DIR(“$directory/$file”); }else{ if(($file!=”.”) AND ($file!=”..”)){ unlink(“$directory/$file”); //echo “unlink $directory/$file ok “; } } } $mydir->close(); rmdir($directory); //echo “rmdir $directory ok “; } ?> 目录名称合法性检测函式 //目录名称合法性检测 function isen($str){ $ret=”"; for($i=0;$i $p=ord(substr($str,$i,1)); if(($p57 & $p90 & $p122){ nerror(“不符合规范!”); } $ret.=chr($p); } return $ret; } ?> PHP分页函数 //分页函数 function splitlist($HALT,$LRLIST,$ECHOCNT,$paper,$table,$where,$page_id,$userid){ global $splitstr,$sumcnt; if($paper==”" || $sumcnt==”"){ $query = “select count(*) as num from $table $where”; $result = mysql_query($query); $row = mysql_fetch_array($result); $sumcnt=$row["num"]; if($sumcnt==0){ nerror(“该版内还没有选择发布新闻 !”); } $paper=1; } $sumpaper=($sumcnt-$sumcnt%$ECHOCNT)/$ECHOCNT; if(($sumcnt%$ECHOCNT)!=0) $sumpaper+=1; if($sumpaper==1 && $HALT==0) return($where); $enwhere=base64_encode(base64_encode($where)); if(($LRLIST*2+1) = $sumpaper){ $tract=$sumpaper-($LRLIST*2); $sub=$sumpaper; }else{ $tract=$paper-$LRLIST; $sub=$paper+$LRLIST; } }else{ $tract=1; $sub=$sumpaper; } $uppaper=$paper-1; $downpaper=$paper+1; $startcnt=($paper-1)*$ECHOCNT; $where.=” limit ${ startcnt },${ ECHOCNT }”; if($tract > 1) { $splitstr=”【 > 】”; else $splitstr.=”>> 】”; return($where); } ?> PHP关于分页函式的使用说明 PHP图片文件上传函式 //图片文件上传函式 function upload_img($UploadFile,$UploadFile_name,$UploadFile_size,$UploadPath,$max_size=64){ //$TimeLimit=60; //设置超时限制时间 缺省时间为 30秒 设置为0时为不限时 //set_time_limit($TimeLimit); if(($UploadFile!= “none” )&&($UploadFile != “” )){ $FileName=$UploadPath.$UploadFile_name; if($UploadFile_size —- PHP文件下载头部输出如何设定 header(“Content-type: application/x-download”); header(“Content-Disposition: attachment; filename=$file_download_name;”); header(“Accept-Ranges: bytes”); header(“Content-Length: $download_size”); echo ‘xxx’ PHP用header输出ftp下载方式,并且支持断点续传 一个例子: header(‘Pragma: public’); header(‘Cache-Control: private’); header(‘Cache-Control: no-cache, must-revalidate’); header(‘Accept-Ranges: bytes’); header(‘Connection: close’); header(“Content-Type: audio/mpeg”); header(“Location:ftp://download:1bk3l4s3k9s2@232.2.22.22/2222/web技术开发知识库/cn_web.rmvb”); PHP正则匹配中文 ereg(“^[".chr(0xa1)."-".chr(0xff)."]+$”, $str); 批量替换文本里面的超级链接 function urlParse($str = ”){ if (” == $str) return $str; $types = array(“http”, “ftp”, “https”); $replace =