Two different strings, using "= =" After comparison, PHP think is equal, it's strange, how to deal with

Two different strings, using "= =" After comparison, PHP think is equal, good strange
if ("0e1683" = = "0e0473") {
echo "equal";
}

The comparison between "0e0983" and "0e0473" will also be equal, which is why?
------Solution--------------------
You have a very special formula, you have to use a surrogate type of comparison.
if ("0e1683" = = = "0e0473")

The reason is this:
PHP automatically converts data types when compared, making the data types on both sides of an expression consistent. This and plain? Different things are not comparable.
Like a blank sheet of paper and a bill, you can't compare it.
PHP observes that both 0e1683 and 0e0473 are numbers of scientific notation, so they are compared by numerical values.
and 0e1683 means 0 times 10 of 1683, and the result is 0 (0 times any number is 0)
0e0473 is 0, too.
0 = = 0
The expression is set up

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