PHP5.3 snapshots

< PHP 截取字符串专题
作者: 不详 来源: 不详

1. 截取GB2312中文字符串
<?php
//截取中文字符串
function mysubstr($str, $start, $len) {
    $tmpstr = "";
    $strlen = $start + $len;
    for($i = 0; $i < $strlen; $i++) {
        if(ord(substr($str, $i, 1)) > 0xa0) {
            $tmpstr .= substr($str, $i, 2);
            $i++;
        } else
            $tmpstr .= substr($str, $i, 1);
    }
    return $tmpstr;
}
?>

2. 截取utf8编码的多字节字符串
<?php
//截取utf8字符串
function utf8Substr($str, $from, $len)
{
    return preg_replace(''#^(?:[x00-x7F]|[xC0-xFF][x80-xBF]+){0,''.$from.''}''.
                       ''((?:[x00-x7F]|[xC0-xFF][x80-xBF]+){0,''.$len.''}).*#s'',
                       ''$1'',$str);
}
?>

3. UTF-8、GB2312都支持的汉字截取函数
<?php
/*
Utf-8、gb2312都支持的汉字截取函数
cut_str(字符串, 截取长度, 开始长度, 编码);
编码默认为 utf-8
开始长度默认为 0
*/
 
function cut_str($string, $sublen, $start = 0, $code = ''UTF-8'')
{
    if($code == ''UTF-8'')
    {
        $pa = "/[x01-x7f]|[xc2-xdf][x80-xbf]|xe0[xa0-xbf][x80-xbf]|[xe1-xef][x80-xbf][x80-xbf]|xf0[x90-xbf][x80-xbf][x80-xbf]|[xf1-xf7][x80-xbf][x80-xbf][x80-xbf]/";
        preg_match_all($pa, $string, $t_string);
 
        if(count($t_string[0]) - $start > $sublen) return join('''', array_slice($t_string[0], $start, $sublen))."...";
        return join('''', <?php 

//定义一个excel文件 
$workbook = "C:/My Documents/test.xls"; 
$sheet = "Sheet1"; 

//生成一个com对象&ensp;$ex 
$ex = new COM("Excel.sheet") or Die ("连不上！！！"); 

//打开一个excel文件 
$book = &ensp;$ex->application->Workbooks->Open(&ensp;$workbook) or Die ("打不开！！！"); 

$sheets = &ensp;$book->Worksheets(&ensp;$sheet); 
$sheets->activate; 

//获取一个单元格 
$cell 感谢dxf218

我修正了其中一点点小小小的问题
<?php
/*
*    FileName                :    cache.inc.php
*    Link                    :   [url]http://blog.111cn.net/dxflingxing/[/url]
*    Author                    :   dxflingxing
*    Date                    :    2006-5-9
*    Last Modified            :    2006-5-16
*    Version                    :    1.0.1
*    Descrīption                :    Cache a page in file formart
*    Notice                    :    Make sure you cache file dir can be readed and wrote
*
*    Thanks to                :    小邪,barryonline(寒)
************************************************************
*
*    Usage                    :
*        # Cache active time half an hour
*        # This Can Auotmatic make some none exist dirs
*        # Or you can use an cache file in curent dir
*        # The Usage Such as
*        # $cache   

< 创建类似"../../../xxx/xxx.txt"的目录都很好！

function mkdirs($path, $mode = 0777) //creates directory tree recursively
{
$dirs = explode(''/'',$path);
$pos = strrpos($path, ".");
if ($pos === false) { // note: three equal signs
// not found, means path ends in a dir not file
$subamount=0;
}
else {
$subamount=1;
}

for ($c=0;$c < count($dirs) - $subamount; $c++) {
$thispath="";
for ($cc=0; $cc <= $c; $cc++) {
$thispath.=$dirs[$cc].''/'';
}
if (!file_exists($thispath)) {
//print "$thispath<br>";
mkdir($thispath,$mode);
}
}
}

原函数中使用$GLOBALS["dirseparator"]我改成了''/''

function recur_mkdirs($path, $mode = 0777) //creates directory tree recursively
{
//$GLOBALS["dirseparator"]
$dirs = explode($GLOBALS["dirseparator"],$path);
$pos = strrpos($path, ".");
if ($pos === false) { // note: three equal signs
// not found, means path ends in a dir not file
$subamount=0;
}
else {
$subamount=1;
}

for ($c=0;$c < count($dirs) - $subamount; $c++) {
$thispath="";
for ($cc=0; $cc <= $c; $cc++) {
$thispath.=$dirs[$cc].$GLOBALS["dirseparator"];
}
if (!file_exists($thispath)) {
//print "$thispath<br>";
mkdir($thispath,$mode);
}
}

}

 

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