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Update details of PHP undefined constants

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Since PHP 8.0 these now give an error.
This commit is contained in:
Olly Betts 2021-05-04 14:20:28 +12:00
commit 2de563a32e
1 changed files with 7 additions and 8 deletions
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15
Doc/Manual/Php.html
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@ -226,14 +226,13 @@ echo "E = " . E . "\n";
</div>
<p>
There's one peculiarity of how constants work in PHP which it is useful
to note (this is not specific to SWIG though) - if you try to use an undeclared
constant, PHP will emit a warning (or a notice in PHP 7.1 and earlier) and then
expand the constant to a string version of the constant's name. Unfortunately
it is easy to miss the warning message if you're using PHP in a webserver as
it will probably end up in error.log or similar. Apparently this will throw
an Error in a future version of PHP, but until then it's something to be
aware of.
There's one peculiarity of how constants work in PHP prior to PHP 8
which it is useful to note (this is not specific to SWIG though) - if you try
to use an undeclared constant, PHP will emit a warning (or a notice in PHP 7.1
and earlier) and then expand the constant to a string version of the constant's
name. Unfortunately it is easy to miss the warning message if you're using PHP
in a webserver as it will probably end up in error.log or similar. PHP 8.0
made this an error.
</p>
<p>