Check this one out (I use it to define functions for versions of PHP that don't
have wordwrap defined for example):
// Function to determine if the current version of PHP is
// at least the one specified as a string in the parameter.
// This is needed because string comparison isn't always accurate:
// "4.0.2">"4.0.12" as strings, although that's not true when
// speaking of comparing versions.
// Usage example:
// if (!isphpver("4.0.2"))
// {
// [do something]
// }
// Bogdan Stancescu <[EMAIL PROTECTED]>, November 2001
// You may freely use this function as long as you keep the header
function isphpver($minver)
{
$itis=2; // That is, undecided
$minimum=explode(".",$minver);
$current=explode(".",phpversion());
for ($i=0;(($i<sizeof($current)) && ($i<sizeof($minimum)));$i++)
{
if ($current[$i]>$minimum[$i])
{
$itis=true; // In this case, we have a winner
break;
}
if ($current[$i]<$minimum[$i]) // >
{
$itis=false; // In this case, we have a loser
break;
}
}
if ($itis==2) // This would only happen if all the common version
// components are identical. But there are may be
// differences:
// Example 1: comparing "4.0.1" with "4.0" would be
// identical for now, but the condition
// is satisfied;
// Example 2: comparing "4.0" with "4.0.1" - identical
// for now, but the condition is NOT
// satisfied
{
if (sizeof($current)>=sizeof($minimum))
{
$itis=true;
}
else
{
// Ok, only one more chance: if for example the user
// specified "4.0.0" and phpversion returned "4.0".
for ($i=sizeof($current)-1;$i<sizeof($minimum);$i++) // >
{
if ($minimum[$i])
{
$itis=false;
}
}
if ($itis==2)
{
$itis=true;
}
}
}
return($itis);
}
Alan McFarlane wrote:
> What's the best method for checking the PHP version number.
>
> I'm assuming that include() was available in all versions, so, from my main
> index.php script, I include a local script (common.php) :
>
> <?php
> // assume minimum version of PHP required is 4.0.5
> if (phpversion() < 4) { die("wrong version"); }
> $ver = explode(".", phpversion());
> if ($ver[2] < 5) { die("wrong version"); }
> ?>
>
> The problem I can see is that some of the earlier 4+ versions had a funny
> number scheme - i.e. 4.0.1pl2.
>
> Does anyone have a complete list of version numbers (or a better method of
> version checking)?
>
> --
> PHP General Mailing List (http://www.php.net/)
> To unsubscribe, visit: http://www.php.net/unsub.php
--
PHP General Mailing List (http://www.php.net/)
To unsubscribe, visit: http://www.php.net/unsub.php
