Checking PHP version for compatibility?

[rustysmith@bellsouth.net]

Anyone know how to check the PHP version that a current file is
running on? This would be helpful in the instance where you are trying
to make a package that can be distributed publicly for use in a variety
of configurations. This code should(?) work:

$ver=PHP_VERSIO N;
if(ereg('^[1-4]',$ver))
$post_ids=array _flip(&$post_id s); // Old syntax
else
$post_ids=array _flip($post_ids ); // PHP 5+ syntax

but it still throws the error:

Warning: Call-time pass-by-reference has been deprecated - argument
passed by value; If you would like to pass it by reference, modify the
declaration of array_flip(). If you would like to enable call-time
pass-by-reference, you can set allow_call_time _pass_reference to true
in your INI file. However, future versions may not support this any
longer.

When executed in PHP 5.+

Thanks in advance for any ideas how to make this work?

[Chris Hope]

Re: Checking PHP version for compatibility?

rustysmith@bell south.net wrote:

Anyone know how to check the PHP version that a current file is
running on? This would be helpful in the instance where you are trying
to make a package that can be distributed publicly for use in a
variety
of configurations. This code should(?) work:
>
$ver=PHP_VERSIO N;
if(ereg('^[1-4]',$ver))
$post_ids=array _flip(&$post_id s); // Old syntax
else
$post_ids=array _flip($post_ids ); // PHP 5+ syntax
>
but it still throws the error:
>
Warning: Call-time pass-by-reference has been deprecated - argument
passed by value; If you would like to pass it by reference, modify the
declaration of array_flip(). If you would like to enable call-time
pass-by-reference, you can set allow_call_time _pass_reference to true
in your INI file. However, future versions may not support this any
longer.
>
When executed in PHP 5.+
>
Thanks in advance for any ideas how to make this work?

I don't get the error when running either of your calls using PHP 5.1.2

As far as testing for the version, why not just do it like this instead
of using a regular expression:

if(PHP_VERSION >= 5) {
... php 5 code here ...
}
else {
... earlier versions code here ...
}

--
Chris Hope | www.electrictoolbox.com | www.linuxcdmall.com

[Rusty]

Re: Checking PHP version for compatibility?

Thanks for the quick reply Chris - I tried it as you wrote and still
get the same warning. To get rid of the warning I get rid of the "&",
but then I do not think it will work with PHP 4.0. There must be
something up with our PHP setup (windows IIS) - I will check with our
server folks in the AM - but again a serious thanks again for the help
- this wil have me a little further down the raod in the morning!

Rusty

Chris Hope wrote:

rustysmith@bell south.net wrote:
>

Anyone know how to check the PHP version that a current file is
running on? This would be helpful in the instance where you are trying
to make a package that can be distributed publicly for use in a
variety
of configurations. This code should(?) work:

$ver=PHP_VERSIO N;
if(ereg('^[1-4]',$ver))
$post_ids=array _flip(&$post_id s); // Old syntax
else
$post_ids=array _flip($post_ids ); // PHP 5+ syntax

but it still throws the error:

Warning: Call-time pass-by-reference has been deprecated - argument
passed by value; If you would like to pass it by reference, modify the
declaration of array_flip(). If you would like to enable call-time
pass-by-reference, you can set allow_call_time _pass_reference to true
in your INI file. However, future versions may not support this any
longer.

When executed in PHP 5.+

Thanks in advance for any ideas how to make this work?

>
I don't get the error when running either of your calls using PHP 5.1.2
>
As far as testing for the version, why not just do it like this instead
of using a regular expression:
>
if(PHP_VERSION >= 5) {
... php 5 code here ...
}
else {
... earlier versions code here ...
}
>
--
Chris Hope | www.electrictoolbox.com | www.linuxcdmall.com

[Jerry Stuckle]

Re: Checking PHP version for compatibility?

rustysmith@bell south.net wrote:

Anyone know how to check the PHP version that a current file is
running on? This would be helpful in the instance where you are trying
to make a package that can be distributed publicly for use in a variety
of configurations. This code should(?) work:
>
$ver=PHP_VERSIO N;
if(ereg('^[1-4]',$ver))
$post_ids=array _flip(&$post_id s); // Old syntax
else
$post_ids=array _flip($post_ids ); // PHP 5+ syntax
>
but it still throws the error:
>
Warning: Call-time pass-by-reference has been deprecated - argument
passed by value; If you would like to pass it by reference, modify the
declaration of array_flip(). If you would like to enable call-time
pass-by-reference, you can set allow_call_time _pass_reference to true
in your INI file. However, future versions may not support this any
longer.
>
When executed in PHP 5.+
>
Thanks in advance for any ideas how to make this work?
>

That's because this is a compile-time notice, not a run-time one.

array_flip() does not take a reference to the array, it is expecting a
copy. So you should just use

$post_ids=array _flip($post_ids );

in either version.

--
=============== ===
Remove the "x" from my email address
Jerry Stuckle
JDS Computer Training Corp.
jstucklex@attgl obal.net
=============== ===

[Mateusz Markowski]

Re: Checking PHP version for compatibility?


rustysmith@bell south.net napisal(a):

Anyone know how to check the PHP version that a current file is
running on? This would be helpful in the instance where you are trying
to make a package that can be distributed publicly for use in a variety
of configurations. This code should(?) work:
>
$ver=PHP_VERSIO N;
if(ereg('^[1-4]',$ver))
$post_ids=array _flip(&$post_id s); // Old syntax
else
$post_ids=array _flip($post_ids ); // PHP 5+ syntax
>

For version comapring you should write:

if (version_compar e(phpversion(), '4.0.0', '>='))
//version above 4.0.0
else
//version below 4.0.0

But it won't work in a way you want. For example:
<?php

if (version_compar e(phpversion(), '5.0.0', '>=')){
//PHP5
class Foo{
private $foobar;
public function __construct(){
echo 'Foo';
}
}
}else{
//PHP5
class Foo{
var $foobar;
function Foo(){
echo 'Foo';
}
}
}
?>
The PHP4's parser will give you a parse error.
If you want to be compatibile with both versions, just write in PHP4.

[Colin Fine]

Re: Checking PHP version for compatibility?

Mateusz Markowski wrote:

rustysmith@bell south.net napisal(a):

>Anyone know how to check the PHP version that a current file is
>running on? This would be helpful in the instance where you are trying
>to make a package that can be distributed publicly for use in a variety
>of configurations. This code should(?) work:
>>
>$ver=PHP_VERSI ON;
> if(ereg('^[1-4]',$ver))
> $post_ids=array _flip(&$post_id s); // Old syntax
> else
> $post_ids=array _flip($post_ids ); // PHP 5+ syntax
>>

>
For version comapring you should write:
>
if (version_compar e(phpversion(), '4.0.0', '>='))
//version above 4.0.0
else
//version below 4.0.0
>
But it won't work in a way you want. For example:
<?php
>
if (version_compar e(phpversion(), '5.0.0', '>=')){
//PHP5
class Foo{
private $foobar;
public function __construct(){
echo 'Foo';
}
}
}else{
//PHP5
class Foo{
var $foobar;
function Foo(){
echo 'Foo';
}
}
}
?>
The PHP4's parser will give you a parse error.
If you want to be compatibile with both versions, just write in PHP4.
>

But then you have to turn NOTICES off (not necessarily in this case, but
in some incompatibiliti es).
I've ended up taking my own copy of PEAR::Date and editing it to declare
all the static functions as static in order to use it in PHP5 without
notices.
I can't believe this is the right way to deal with the problem, but I
don't know what else to do.

Colin

[Jerry Stuckle]

Re: Checking PHP version for compatibility?

Colin Fine wrote:

Mateusz Markowski wrote:
>

>rustysmith@bell south.net napisal(a):
>>

>>Anyone know how to check the PHP version that a current file is
>>running on? This would be helpful in the instance where you are trying
>>to make a package that can be distributed publicly for use in a variety
>>of configurations. This code should(?) work:
>>>
>>$ver=PHP_VERS ION;
>> if(ereg('^[1-4]',$ver))
>> $post_ids=array _flip(&$post_id s); // Old syntax
>> else
>> $post_ids=array _flip($post_ids ); // PHP 5+ syntax
>>>

>>
>For version comapring you should write:
>>
> if (version_compar e(phpversion(), '4.0.0', '>='))
> //version above 4.0.0
> else
> //version below 4.0.0
>>
>But it won't work in a way you want. For example:
><?php
>>
> if (version_compar e(phpversion(), '5.0.0', '>=')){
> //PHP5
> class Foo{
> private $foobar;
> public function __construct(){
> echo 'Foo';
> }
> }
> }else{
> //PHP5
> class Foo{
> var $foobar;
> function Foo(){
> echo 'Foo';
> }
> }
> }
>?>
>The PHP4's parser will give you a parse error.
>If you want to be compatibile with both versions, just write in PHP4.
>>

But then you have to turn NOTICES off (not necessarily in this case, but
in some incompatibiliti es).
I've ended up taking my own copy of PEAR::Date and editing it to declare
all the static functions as static in order to use it in PHP5 without
notices.
I can't believe this is the right way to deal with the problem, but I
don't know what else to do.
>
Colin

Maybe put the level-specific code in two different files and include the
appropriate file based on the PHP version?

--
=============== ===
Remove the "x" from my email address
Jerry Stuckle
JDS Computer Training Corp.
jstucklex@attgl obal.net
=============== ===

[Colin Fine]

Re: Checking PHP version for compatibility?

Jerry Stuckle wrote:

Colin Fine wrote:

>Mateusz Markowski wrote:
>>

>>rustysmith@bell south.net napisal(a):
>>>
>>>Anyone know how to check the PHP version that a current file is
>>>running on? This would be helpful in the instance where you are trying
>>>to make a package that can be distributed publicly for use in a variety
>>>of configurations. This code should(?) work:
>>>>
>>>$ver=PHP_VER SION;
>>> if(ereg('^[1-4]',$ver))
>>> $post_ids=array _flip(&$post_id s); // Old syntax
>>> else
>>> $post_ids=array _flip($post_ids ); // PHP 5+ syntax
>>>>
>>>
>>For version comapring you should write:
>>>
>> if (version_compar e(phpversion(), '4.0.0', '>='))
>> //version above 4.0.0
>> else
>> //version below 4.0.0
>>>
>>But it won't work in a way you want. For example:
>><?php
>>>
>> if (version_compar e(phpversion(), '5.0.0', '>=')){
>> //PHP5
>> class Foo{
>> private $foobar;
>> public function __construct(){
>> echo 'Foo';
>> }
>> }
>> }else{
>> //PHP5
>> class Foo{
>> var $foobar;
>> function Foo(){
>> echo 'Foo';
>> }
>> }
>> }
>>?>
>>The PHP4's parser will give you a parse error.
>>If you want to be compatibile with both versions, just write in PHP4.
>>>

>But then you have to turn NOTICES off (not necessarily in this case,
>but in some incompatibiliti es).
>I've ended up taking my own copy of PEAR::Date and editing it to
>declare all the static functions as static in order to use it in PHP5
>without notices.
>I can't believe this is the right way to deal with the problem, but I
>don't know what else to do.
>>
>Colin

>
Maybe put the level-specific code in two different files and include the
appropriate file based on the PHP version?
>

Well I guess that might do for the original poster, who wants to provide
a package that will work with either version; though it seems a horribly
messy way of handling an obvious problem.

For my purposes, all I want to do is use an existing PEAR class in PHP5.
AFAIK this class is not available in a PHP5 version, so the best I have
thought of doing, as I say, is taking my own copy and editing it.

Now, there may be some PEAR packages which are so dependent on the way
PHP4 works that they will require a rewrite for PHP5: but the package I
am using (Date) seems to require only that a number of functions be
declared 'static'.
Given this, is seems a pity - and surprising - that PHP apparently
offers no way that the writer could make the package acceptable to both
PHP4 and 5. Or is there such a way, that I'm missing?

Colin