Call to undefined function -- PHP variable functions

[Jim Bailie]

This example from https://www.php.net/manual/en/functions.variable-functions.php does not work in PW or any script bootstrapping the same (namespacing?).

function foo() {
    echo "In foo()<br />\n";
}

$func = 'foo';
$func();  // This calls foo()

I'm sure there is an explanation for this, but I haven't been able to discover that as of yet.

[Robin S]

2 hours ago, Jim Bailie said:

namespacing?

Yes, it's because of the ProcessWire namespace. Add it when setting the function name to your variable:

$func = 'ProcessWire\foo';

 

[Jim Bailie]

@Robin S Interesting. Looks like another area to brush up on. Thanks again!

[da²]

It's particular to call a function by a string. 99.99 % of the time you have better to do.

[Jim Bailie]

@da² It certainly is peculiar; disdainful even. But this is that one basis point case where it's simply a convenience to show/format a bunch of legacy content from an old database.