当“静态”时不是“静态的” [英] When "static" isn't "static"

问题描述

[PHP]

函数blah（$ item）{

if（！isset（$ baseDir））{

static $ baseDir ='''';

$ baseDir = $ item;

print_r（" baseDir = $ baseDir \ n"）;

}


$ dirID = opendir（$ item）;

while（（$ fyl = readdir（$ dirID））！== false）{

if（is_dir（" $ baseDir / $ fyl"））blah（$ item）;

//如果它是一个文件，请做其他麻烦

}

}

[/ PHP]


我使用PHP 4.3.2并且以下内容发生在blah中（ ）：

[PHP]
function blah($item) {
if (!isset($baseDir)) {
static $baseDir = '''';
$baseDir = $item;
print_r("baseDir = $baseDir\n");
}

$dirID = opendir($item);
while (($fyl = readdir($dirID)) !== false) {
if (is_dir("$baseDir/$fyl")) blah($item);
// DO OTHER STUFF IF IT IS A FILE
}
}
[/PHP]

I am using PHP 4.3.2 and the following occurs within blah() :

baseDir = / home / me / stuff

baseDir = /home/me/stuff/.

baseDir = /home/me/stuff/./ ..

baseDir = /home/me/stuff
baseDir = /home/me/stuff/.
baseDir = /home/me/stuff/./..

我的印象是静态变量保留其值

整个函数（或方法）递归内存堆栈。然而，它每次都会改变
因为它显然会失去它的设定值。


不用说我很困惑。我对静态是错的;如果是的话，

我还能做些什么来保留这个价值？我不能使用$ _SESSION这个

是命令行PHP而不是API。


Thanx

Phil

I was under the impression that a static variable retains its value
throughout a function (or method) recursive memory stack. However, it
changes everytime because it apparently loses its set value.

Needless to mention I''m confused. Was I wrong about static; if so,
what else do I do to retain this value? I cannot use $_SESSION as this
is command-line PHP instead of API.

Thanx
Phil

推荐答案

item）{

if（！isset（

item) {
if (!isset(

baseDir） ）{

static

baseDir)) {
static

baseDir ='''';

baseDir = '''';

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