Added informations in format_currency and format_number docs

[FlorianChenot]

No description provided.

[FlorianChenot]

I added the format_number filter in this PR because it is really close to format_currency

[smnandre]

Could be more descriptive of the lenient parsing effect

[FlorianChenot]

I couldn't find a useful example, do you have any ideas ?

[smnandre]

I'm not sure here, to be honest. As i see it, the "lenient_parse" is a way to allow data that is not perfectly in the expected syntax...

<?php

$formatter = NumberFormatter::create('fr-FR', NumberFormatter::CURRENCY);

foreach ([false, true] as $lenientParse) {

    echo 'lenientParse: ' . ($lenientParse ? 'true' : 'false') . PHP_EOL;
    $formatter->setAttribute(NumberFormatter::LENIENT_PARSE, $lenientParse);

    echo $formatter->format(-9) . PHP_EOL;
    echo $formatter->format('.9') . PHP_EOL;
    echo $formatter->format(12.34000) . PHP_EOL;

    echo $formatter->format($formatter->parse('56,7800000')) . PHP_EOL;
    echo $formatter->format($formatter->parse('56,78')) . PHP_EOL;
    echo $formatter->format($formatter->parse('56,78€')) . PHP_EOL;
    echo $formatter->format($formatter->parse('56,78 €')) . PHP_EOL;
    echo $formatter->format($formatter->parse('56,78 €')) . PHP_EOL;
}

Would render

lenientParse: false
 -9,00 €
0,90 €
12,34 €
-0,00 €
-0,00 €
-0,00 €
-0,00 €
56,78 €

lenientParse: true
 -9,00 €
0,90 €
12,34 €
+56,78 €
+56,78 €
+56,78 €
+56,78 €
56,78 €

As you see, it's when the parse method is called it makes a difference.

But it this specific case (currency), as we do not call "parse", and the format method only accept int|float, i don't see a concrete exemple where it would have an impact.