[PHP-DEV] Create a class variable in extension?

[phpdev]

Hello,

1. I have been able to create a class within my extension, but am unable
to create a class variable that can be used throughout the class
methods. This class variable needs to be an array. Below is how I would
write the class in php.
class foo {
  var $foo = array();

  functions...
}

2. How can you create a constructor for your class in an extension that
loads when somebody calls $var = new foo();? Below is what I mean in php
classes:
class foo {
   function foo() {
   ...
   }
}


Thanks for any help,
Daniel Simser
[EMAIL PROTECTED]


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[PHP-DEV] Bug #10656: shmop_open permissions incorrect for writing

[phpdev]

From: [EMAIL PROTECTED]
IP Address:   203.48.38.170
Operating system: FreeBSD 4.3 (i386)
PHP version:  4.0.5
PHP Bug Type: Unknown/Other Function
Bug description:  shmop_open permissions incorrect for writing

Basically, the shmop_open function does not allow for writing to shared memory if 
pre-allocated memory is opened using the ACCESS (rather than CREATE) mode. This was 
found when using the shmop functions for fast interprocess communication between a 
number of php cgi scripts. The solution to this bug was to create another mode, WRITE 
(w) that uses IPC_R & IPC_W shm flags.

To reproduce the problem:-

# ** BEFORE fix modifications are made **
# ** change to php cgi directory and run server command (C) in one telnet session then 
run client command (A) in another. Client cannot write!
echo '' | ./php -q &
echo '' | ./php -q

# ** shmop_open in ACCESS mode does not allow writing to shared memory!
# ** So, I created a WRITE ("w") mode to allow writing and left ACCESS ("a") mode as 
read_only.

# ** AFTER fix modifications are made **
# ** change to php cgi directory and run server command (C) in one telnet session then 
run new client command (W) in another. Client can now write.
echo '' | ./php -q &
echo '' | ./php -q

# ** Modifications required for bug fix, include changing ext/shmop.c

Existing /ext/shmop.c [shmop_open()]:

/* {{{ proto int shmop_open (int key, int flags, int mode, int size)
   gets and attaches a shared memory segment */
PHP_FUNCTION(shmop_open)
{
...
if (memchr((*flags)->value.str.val, 'a', (*flags)->value.str.len)) {
shmflg = SHM_RDONLY;
shmop->shmflg |= IPC_EXCL;
}
else if (memchr((*flags)->value.str.val, 'c', 
(*flags)->value.str.len)) {
shmop->shmflg |= IPC_CREAT;
shmop->size = (*size)->value.lval;
}
else {
php_error(E_WARNING, "shmopen: access mode invalid");
efree(shmop);
RETURN_FALSE;
}

shmop->shmid = shmget(shmop->key, shmop->size, shmop->shmflg);
if (shmop->shmid == -1) {
php_error(E_WARNING, "shmopen: can't get the block");
efree(shmop);
RETURN_FALSE;
}
...
}
/* }}} */

Corrected /ext/shmop.c [shmop_open()]:

/* {{{ proto int shmop_open (int key, int flags, int mode, int size)
   gets and attaches a shared memory segment */
PHP_FUNCTION(shmop_open)
{
...
if (memchr((*flags)->value.str.val, 'a', (*flags)->value.str.len)) {
shmflg = SHM_RDONLY;
shmop->shmflg |= IPC_EXCL;
}
else if (memchr((*flags)->value.str.val, 'c', 
(*flags)->value.str.len)) {
shmop->shmflg |= IPC_CREAT;
shmop->size = (*size)->value.lval;
}
else if (memchr((*flags)->value.str.val, 'w', 
(*flags)->value.str.len)) {
shmop->shmflg |= IPC_R;
shmop->shmflg |= IPC_EXCL;
shmop->shmflg |= IPC_W;
}
else {
php_error(E_WARNING, "shmopen: access mode invalid");
efree(shmop);
RETURN_FALSE;
}
...
}
/* }}} */

# * Configuration lines for php_4.0.5.tar.gz compiling
./configure "--enable-memory-limit=yes" "--enable-sockets" "--with-openssl" 
"--enable-shmop" "--enable-debug=no" "--enable-xml" "--enable-ftp" 
"--with-config-file-path=/etc" "--with-mysql=/usr/local/" 
"--with-sybase=/usr/local/freetds/" "--enable-dba=yes" "--with-gdbm=/usr/local/" 
"--with-mhash=/usr/local/" "--with-curl=/usr/local/" "--with-zlib=/usr/local/" 
"--with-gd=/usr/local/"
# Search/replace required for freetds implementation
perl -pi -e 's/dbopen/tdsdbopen/g; s/(DBSETLCHARSET)/\/\/$1/g;' 
ext/sybase/php_sybase_db.c

# * PHP.ini not considered relevant to this bug report.



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Edit Bug report at: http://bugs.php.net/?id=10656&edit=1



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