'100' == '100.00'?

Question

PHP

Gentlemen, help me understand)
Why
'100' == '100.00' //true
and
'100' == '100,00' //false
After all, in both cases, all operands will be converted to int type and everywhere there will be 100

Answer 1

Because the comma is not considered a delimiter in PHP, so it cannot cast '100,00' to a number and compares it as a string