Lesbarkeit und Konvention in PHP und Javascript "==" und "==="

[tami]

hi,

so in diese Richtung sollte meine Argumentation gehen:

"== is useless.

It’s not transitive. "foo" == TRUE, and "foo" == 0… but, of course, TRUE != 0.

== converts to numbers when possible (123 == "123foo"… although "123" != "123foo"), which means it converts to floats when possible. So large hex strings (like, say, password hashes) may occasionally compare true when they’re not. Even JavaScript doesn’t do this.

For the same reason, "6" == " 6", "4.2" == "4.20", and "133" == "0133". But note that 133 != 0133, because 0133 is octal. But "0x10" == "16" and "1e3" == "1000"!

=== compares values and type… except with objects, where === is only true if both operands are actually the same object! For objects, == compares both value (of every attribute) and type, which is what === does for every other type. What."

http://me.veekun.com/blog/2012/04/09/php-a-fractal-of-bad-design/

mfg

tami