Marc van Nieuwenhuijzen Marc van Nieuwenhuijzen - 1 year ago 62
PHP Question

Visually same string gives different var_dumps in php

UPDATE: Anwer is here PHP unserialize fails with non-encoded characters?

I'm trying to match objects with in_array. This works fine except for the object with this string as a property. Visually they are the same, but when I do a var_dump PHP sees different lengths.

var_dump results:

string(26) "Waar zijn mijn centjes

Answer Source

Let's look at the hex dump of your strings:




As we can clearly see, there's only a difference in the end: f09f91bc becomes 26237831663437633b.

So what's the difference?

f09f91bc is the hex representation of U+1F47C BABY ANGEL character (👼), so that one is perfect UTF-8.

But 26237831663437633b isn't UTF-8 anymore, the string is actually ASCII and translates to 👼, so it's simply HTML's numeric character reference of the baby angel character.

So the angel must have somewhere been translated to its HTML numeric character reference and that is not something that happens just when writing and reading from a file or a DB. I'd guess it has happened somewhere in your output processing.

You may use html_entity_decode to translate the HTML entities back to their UTF-8 equivalent:

$a = html_entity_decode('Waar    zijn mijn centjes👼');
$b = 'Waar    zijn mijn centjes
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