PHP常用函数
时间：2007-02-17 来源：PHP爱好者
常用函数,不用说的啦.........function message($C_alert,$I_goback='') {
if(!empty($I_goback)) {
echo "<script>alert('$C_alert');window.location.href='$I_goback';</script>";
} else {
echo "<script>alert('$C_alert');</script>";
}
}/**
* 判断下拉菜音的选取项
*
* 可以判断字符串一和字符串二是否相等.从而使相等的项目在下拉菜单中被选择
*
* @access public
* @param string $str1 要比较的字符串一
* @param string $str2 要比较的字符串二
* @return string 相等返回字符串"selected",否则返回空字符串
*/
function selected($str1,$str2) {
if($str1==$str2) {
return ' selected';
}
return '';
}/**
* 截取中文部分字符串
*
* 截取指定字符串指定长度的函数,该函数可自动判定中英文,不会出现乱码
*
* @access public
* @param string $str 要处理的字符串
* @param int $strlen 要截取的长度默认为10
* @param string $other 是否要加上省略号,默认会加上
* @return string
*/
function showtitle($str,$strlen=10,$other=true) {
$j = 0;
for($i=0;$i<$strlen;$i++)
if(ord(substr($str,$i,1))>0xa0) $j++;
if($j%2!=0) $strlen++;
$rstr=substr($str,0,$strlen);
if (strlen($str)>$strlen && $other)
return $rstr;
}
/////////////function createdir($dir='')
{
if (!is_dir($dir))
{
$temp = explode('/',$dir);
$cur_dir = '';
for($i=0;$i<count($temp);$i++)
{
$cur_dir .= $temp[$i].'/';
if (!is_dir($cur_dir))
{
@mkdir($cur_dir,0777);
}
}
}
}////////////function dhtmlspecialchars($string) {
if(is_array($string)) {
foreach($string as $key => $val) {
$string[$key] = dhtmlspecialchars($val);
}
} else {
$string = str_replace('&', '&', $string);
$string = str_replace('"', '"', $string);
$string = str_replace('<', '<', $string);
$string = str_replace('>', '>', $string);
$string = preg_replace('/&(#d;)/', '&1', $string);
}
return $string;
}/////////function daddslashes($string, $force = 0) {
if(!$GLOBALS['magic_quotes_gpc'] || $force) {
if(is_array($string)) {
foreach($string as $key => $val) {
$string[$key] = daddslashes($val, $force);
}
} else {
$string = addslashes($string);
}
}
return $string;
}/////////.function random($length) {
$hash = '';
$chars = 'ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789abcdefghijklmnopqrstuvwxyz';
$max = strlen($chars) - 1;
mt_srand((double)microtime() * 1000000);
for($i = 0; $i <$length; $i++) {
$hash .= $chars[mt_rand(0, $max)];
}
return $hash;
}//////function wordscut($string, $length ,$sss=0) {
if(strlen($string) > $length) {
if($sss){
$length=$length - 3;
$addstr=' ...';
}
for($i = 0; $i <$length; $i++) {
if(ord($string[$i]) > 127) {
$wordscut .= $string[$i].$string[$i + 1];
$i++;
} else {
$wordscut .= $string[$i];
}
}
return $wordscut.$addstr; }
return $string;
}/////////function sizecount($filesize) {
if($filesize >= 1073741824) {
$filesize = round($filesize / 1073741824 * 100) / 100 . ' G';
} elseif($filesize >= 1048576) {
$filesize = round($filesize / 1048576 * 100) / 100 . ' M';
} elseif($filesize >= 1024) {
$filesize = round($filesize / 1024 * 100) / 100 . ' K';
} else {
$filesize = $filesize . ' bytes';
}
return $filesize;
}////////////////function gotourl($message='',$url='')
{
global $language;
$html ="<html><head>";
if(!empty($url))
$html .="<meta http-equiv='refresh' content="1;url='".$url."'">";
$html .="<link href='./html/style.css' type=text/css rel=stylesheet>";
$html .="</head><body><br><br><br><br>";
$html .="<table cellspacing='0' cellpadding='0' border='0' width='450' align='center'>";
$html .="<tr><td bgcolor='#000000'>";
$html .="<table border='0' cellspacing='1' cellpadding='4' width='100%'>";
$html .="<tr class='m_title'>";
$html .="<td>".$language['messagebox_title']."</td></tr>";
$html .="<tr class='line_1'><td align='center' height='60'>";
$html .="<br>".$message."<br><br>";
if (!empty($url))
$html .="[<a href=".$url." target=_self>".$language['messagebox_exp_1']."</a>]";
else
$html .="[<a href='#' onclick='history.go(-1)'>".$language['messagebox_exp_2']."</a>]";
$html .="</td></tr></table></td></tr></table>";
$html .="</body></html>";
echo $html;
exit;
}//////////////function sqldumptable($table, $startfrom = 0, $currsize = 0) {
global $db, $multivol, $sizelimit, $startrow; $offset = 64;
if(!$startfrom)
{
$tabledump = "DROP TABLE IF EXISTS $table;n"; $createtable = $db->query("SHOW CREATE TABLE $table");
$create = $db->fetch_row($createtable); $tabledump .= $create[1].";nn";
} $tabledumped = 0;
$numrows = $offset;
while(($multivol && $currsize + strlen($tabledump) <$sizelimit * 1000 && $numrows == $offset) || (!$multivol && !$tabledumped))
{
$tabledumped = 1;
if($multivol)
{
$limitadd = "LIMIT $startfrom, $offset";
$startfrom += $offset;
} $rows = $db->query("SELECT * FROM $table $limitadd");
$numfields = $db->num_fields($rows);
$numrows = $db->num_rows($rows);
while ($row = $db->fetch_row($rows))
{
$comma = "";
$tabledump .= "INSERT INTO $table VALUES(";
for($i = 0; $i <$numfields; $i++)
{
$tabledump .= $comma."'".mysql_escape_string($row[$i])."'";
$comma = ",";
}
$tabledump .= ");n";
}
} $startrow = $startfrom;
$tabledump .= "n";
return $tabledump;
}//////////function splitsql($sql){
$sql = str_replace("r", "n", $sql);
$ret = array();
$num = 0;
$queriesarray = explode(";n", trim($sql));
unset($sql);
foreach($queriesarray as $query) {
$queries = explode("n", trim($query));
foreach($queries as $query) {
$ret[$num] .= $query[0] == "#" ? NULL : $query;
}
$num++;
}
return($ret);
}
php爱好者站 http://www.ｐｈｐfans.net php动态|php基础|php进阶|php模板.
if(!empty($I_goback)) {
echo "<script>alert('$C_alert');window.location.href='$I_goback';</script>";
} else {
echo "<script>alert('$C_alert');</script>";
}
}/**
* 判断下拉菜音的选取项
*
* 可以判断字符串一和字符串二是否相等.从而使相等的项目在下拉菜单中被选择
*
* @access public
* @param string $str1 要比较的字符串一
* @param string $str2 要比较的字符串二
* @return string 相等返回字符串"selected",否则返回空字符串
*/
function selected($str1,$str2) {
if($str1==$str2) {
return ' selected';
}
return '';
}/**
* 截取中文部分字符串
*
* 截取指定字符串指定长度的函数,该函数可自动判定中英文,不会出现乱码
*
* @access public
* @param string $str 要处理的字符串
* @param int $strlen 要截取的长度默认为10
* @param string $other 是否要加上省略号,默认会加上
* @return string
*/
function showtitle($str,$strlen=10,$other=true) {
$j = 0;
for($i=0;$i<$strlen;$i++)
if(ord(substr($str,$i,1))>0xa0) $j++;
if($j%2!=0) $strlen++;
$rstr=substr($str,0,$strlen);
if (strlen($str)>$strlen && $other)
return $rstr;
}
/////////////function createdir($dir='')
{
if (!is_dir($dir))
{
$temp = explode('/',$dir);
$cur_dir = '';
for($i=0;$i<count($temp);$i++)
{
$cur_dir .= $temp[$i].'/';
if (!is_dir($cur_dir))
{
@mkdir($cur_dir,0777);
}
}
}
}////////////function dhtmlspecialchars($string) {
if(is_array($string)) {
foreach($string as $key => $val) {
$string[$key] = dhtmlspecialchars($val);
}
} else {
$string = str_replace('&', '&', $string);
$string = str_replace('"', '"', $string);
$string = str_replace('<', '<', $string);
$string = str_replace('>', '>', $string);
$string = preg_replace('/&(#d;)/', '&1', $string);
}
return $string;
}/////////function daddslashes($string, $force = 0) {
if(!$GLOBALS['magic_quotes_gpc'] || $force) {
if(is_array($string)) {
foreach($string as $key => $val) {
$string[$key] = daddslashes($val, $force);
}
} else {
$string = addslashes($string);
}
}
return $string;
}/////////.function random($length) {
$hash = '';
$chars = 'ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789abcdefghijklmnopqrstuvwxyz';
$max = strlen($chars) - 1;
mt_srand((double)microtime() * 1000000);
for($i = 0; $i <$length; $i++) {
$hash .= $chars[mt_rand(0, $max)];
}
return $hash;
}//////function wordscut($string, $length ,$sss=0) {
if(strlen($string) > $length) {
if($sss){
$length=$length - 3;
$addstr=' ...';
}
for($i = 0; $i <$length; $i++) {
if(ord($string[$i]) > 127) {
$wordscut .= $string[$i].$string[$i + 1];
$i++;
} else {
$wordscut .= $string[$i];
}
}
return $wordscut.$addstr; }
return $string;
}/////////function sizecount($filesize) {
if($filesize >= 1073741824) {
$filesize = round($filesize / 1073741824 * 100) / 100 . ' G';
} elseif($filesize >= 1048576) {
$filesize = round($filesize / 1048576 * 100) / 100 . ' M';
} elseif($filesize >= 1024) {
$filesize = round($filesize / 1024 * 100) / 100 . ' K';
} else {
$filesize = $filesize . ' bytes';
}
return $filesize;
}////////////////function gotourl($message='',$url='')
{
global $language;
$html ="<html><head>";
if(!empty($url))
$html .="<meta http-equiv='refresh' content="1;url='".$url."'">";
$html .="<link href='./html/style.css' type=text/css rel=stylesheet>";
$html .="</head><body><br><br><br><br>";
$html .="<table cellspacing='0' cellpadding='0' border='0' width='450' align='center'>";
$html .="<tr><td bgcolor='#000000'>";
$html .="<table border='0' cellspacing='1' cellpadding='4' width='100%'>";
$html .="<tr class='m_title'>";
$html .="<td>".$language['messagebox_title']."</td></tr>";
$html .="<tr class='line_1'><td align='center' height='60'>";
$html .="<br>".$message."<br><br>";
if (!empty($url))
$html .="[<a href=".$url." target=_self>".$language['messagebox_exp_1']."</a>]";
else
$html .="[<a href='#' onclick='history.go(-1)'>".$language['messagebox_exp_2']."</a>]";
$html .="</td></tr></table></td></tr></table>";
$html .="</body></html>";
echo $html;
exit;
}//////////////function sqldumptable($table, $startfrom = 0, $currsize = 0) {
global $db, $multivol, $sizelimit, $startrow; $offset = 64;
if(!$startfrom)
{
$tabledump = "DROP TABLE IF EXISTS $table;n"; $createtable = $db->query("SHOW CREATE TABLE $table");
$create = $db->fetch_row($createtable); $tabledump .= $create[1].";nn";
} $tabledumped = 0;
$numrows = $offset;
while(($multivol && $currsize + strlen($tabledump) <$sizelimit * 1000 && $numrows == $offset) || (!$multivol && !$tabledumped))
{
$tabledumped = 1;
if($multivol)
{
$limitadd = "LIMIT $startfrom, $offset";
$startfrom += $offset;
} $rows = $db->query("SELECT * FROM $table $limitadd");
$numfields = $db->num_fields($rows);
$numrows = $db->num_rows($rows);
while ($row = $db->fetch_row($rows))
{
$comma = "";
$tabledump .= "INSERT INTO $table VALUES(";
for($i = 0; $i <$numfields; $i++)
{
$tabledump .= $comma."'".mysql_escape_string($row[$i])."'";
$comma = ",";
}
$tabledump .= ");n";
}
} $startrow = $startfrom;
$tabledump .= "n";
return $tabledump;
}//////////function splitsql($sql){
$sql = str_replace("r", "n", $sql);
$ret = array();
$num = 0;
$queriesarray = explode(";n", trim($sql));
unset($sql);
foreach($queriesarray as $query) {
$queries = explode("n", trim($query));
foreach($queries as $query) {
$ret[$num] .= $query[0] == "#" ? NULL : $query;
}
$num++;
}
return($ret);
}
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