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<?php
class useful{
/*
* ³£Óú¯ÊýÀà
* ×÷ Õߣº¶à²ËÄñ
* ÁªÏµÓÊÏ䣺kingerq AT msn DOT com
* ´´½¨Ê±¼ä£º2005-07-18
* À´Ô´£ºhttp://blog.csdn.net/kingerq
*/
/*
* ¹¦ÄÜ£º¸ñʽ»¯Êý×Ö£¬ÒÔ±ê×¼MONEY¸ñʽÊä³ö
*/
function formatnumber($num){
return number_format($num, 2, ".", ",");
}
/*
* ¹¦ÄÜ£º¸ñʽ»¯Îı¾£¬½«\nת³É<br>µÈ
* ²ÎÊý£º$string À´Ô´×Ö·û´®
* ·µ»Ø£º´¦ÀíºóµÄ×Ö·û´®
*/
function formatstring($string = ""){
$string = preg_replace(array("/\s+/", "/\'/"), array(" ", "\"\""), $string);
$string = htmlspecialchars($string);
return nl2br($string);
}
/*
* ¹¦ÄÜ£º¸ñʽ»¯Îı¾Êä³ö
* ²ÎÊý $text ΪÐè¸ñʽ»¯µÄÎı¾ÄÚÈÝ
* É÷Óã¬Èç¹ûÈÃÓû§ÊäÈëµÄ¿ÉÖ´ÐдúÂëÔÚformatstring´¦Àíºó²åÈçÊý¾Ý¿â£¬È»ºóʹÓô˺¯Êý»áÈôúÂëÖ´ÐÐ
*/
function formatcontent($text){
$trans = get_html_translation_table(HTML_SPECIALCHARS);
$trans = array_flip($trans);
$text = strtr($text, $trans);
//$text = str_replace("\n", "<br>", $text);
//$text = str_replace(" ", " ", $text);
return $text;
}
/*
* ½«×Ö½Úת»»³ÉKb»òÕßMb...
* ²ÎÊý $numΪ×Ö½Ú´óС
*/
function bitsize($num){
if(!preg_match("/^[0-9]+$/", $num)) return 0;
$type = array( "B", "KB", "MB", "GB", "TB", "PB" );
$j = 0;
while( $num >= 1024 ) {
if( $j >= 5 ) return $num.$type[$j];
$num = $num / 1024;
$j++;
}
return $num.$type[$j];
}
/*
* ¹¦ÄÜ£º²»×ã3µÄ±¶ÊýλµÄÊý×Ö£¬ÓÃ0²¹×ã
* $num Ðè²¹³äµÄÊý×Ö
* ·µ»Ø²¹³äÍêÕûµÄÊý×Ö´®
*/
function prefix($num){
if( strlen( $num ) % 3 == 0 ) {
return $this-
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±¾ÎÄת×Ô:http://www.msphome.cn/post/119/
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in_array(value,array,type)
in_array ×÷ÓÃÊÇÓÃÓڲ鿴 value ÊÇ·ñÔÚ array ÖдæÔÚ£¬Èç¹û²ÎÊý value ÊÇ×Ö·û´®£¬ÇÒ type ²ÎÊýÉèÖÃΪ true£¬ÔòËÑË÷Çø·Ö´óСд¡£Ôò in_array ÊÇ Çø·Ö´óСд µÄ¡£
ÓÐÒ»µãÐèҪעÒ⣬µ± array Öаüº¬ value µÄÖµ£¬Ôò·µ»Ø true£» µ«ÊÇ£¬Èç¹ûÁ½Õß²ÎÊýÖ®¼äÏàµÈ£¬Ôò·µ»Ø false
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$str = 'a';
......
Îļþ¶ÁÈ¡º¯Ê½
//Îļþ¶ÁÈ¡º¯Ê½
function PHP_Read($file_name) {
$fd=fopen($file_name,r);
while($bufline=fgets($fd, 4096)){
$buf.=$bufline;
}
fclose($fd);
return $buf;
}
& ......
ÈçºÎÅжÏipµØÖ·ºÏ·¨ÐÔ
if(!strcmp(long2ip(sprintf("%u",ip2long($ip))),$ip)) echo "is ipn";
emailµÄÕýÔòÅжÏ
eregi("^[_.0-9a-zA-Z-]+@([0-9a-zA-Z][0-9a-zA-Z_-]+.)+[a-zA-Z]$", $email);
¼ì²âipµØÖ·ºÍmaskÊÇ·ñºÏ·¨µÄÀý×Ó
$ip = '192.168.0.84';
$mask = '255.255.255.0';
$network = '192.168.0';
$ip = ......