Very useful php functions_PHP tutorial

​ There are some very useful functions that you can save as source code to avoid having to write them again in the future.
File reading function
//File reading function
function PHP_Read($file_name) {
$fd=fopen($file_name,r);
while($bufline=fgets($fd, 4096)){
$buf.=$bufline;
}
fclose($fd);
Return $buf;
}
?>
File writing function
//File writing function
function PHP_Write($file_name,$data,$method="w") {
$filenum=@fopen($file_name,$method);
flock($filenum,LOCK_EX);
$file_data=fwrite($filenum,$data);
fclose($filenum);
Return $file_data;
}
?>
Static page generation function
//Static page generation function
function phptohtm($filefrom,$fileto,$u2u=1){
if($u2u==1){
$data=PHP_Read($filefrom);
}else{
$data=$filefrom;
}
PHP_Write($fileto,$data);
Return true;
}
?>
Specify condition information quantity retrieval function
//Retrieval function for specifying the quantity of conditional information
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 $num;
}
?>
Directory deletion function
//Directory deletion function
function del_DIR($directory){
$mydir=dir($directory);
while($file=$mydir->read()){
if((is_dir("$directory/$file")) AND ($file!=".") AND ($file!="..")){

http://www.bkjia.com/PHPjc/445596.htmlwww.bkjia.comtruehttp: //www.bkjia.com/PHPjc/445596.htmlTechArticleThere are some very useful functions that you can save as source code and avoid duplication in the future. File reading function //File reading function function PHP_Read($file_name) { $fd=fopen($file_na...