1
What’s best and how to use?
I’m trying to run this code for example and it doesn’t work
if(1 !== 1 || 2) {
echo true;
}
it displays the true being that it was to show only if X (in case 1) was indifferent to 1 or 2.
1 answer
4
if can be translated as se 1 não é identico a 1 OU dois(que é true), when exchanging passwords for logical values, SE(falso OU verdadeira) ENTAO ....
The first part of the sentence(1!==1) is false and the second (only the 2) is considered true for php, because the language works with automatic Casts, it defines a number of values that can be evaluated as false and anything else is true, how sentences are connected through ||(OR logical) a true value is enough to validate the condition.
The difference between || and OR is that OR has less priority or in this case get smart for unexpected results or to add parentheses in condition.
Recommended reading
Qual a diferença entre “&&” e “||” e “and” e “or” em PHP? Qual usar?
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I still do not understand very well.. In the case of the code that I quoted even with parentheses in the options he gives
true. -
3
I don’t understand why there’s so much negativity, but I marked yours for sure, thank you!
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If it is a compound condition it is necessary, repeat the predicate in condition. as for the
||andORis the difference yes.– rray
@rray then the way I presented in question is invalid correct?
– Vinícius Lara
What you expect is
if(1 !== 1 || 1 !== 2){ echo true;}?– rray
In addition to what @rray said (include the predicate in the second part of the condition) I think the error is that you are using the operator
||, when you should be using the&&... You want, as I understand it, to writetrueif 1 is different from 1 E if 1 is different from 2. Isn’t that : if(1 !== 1 && 1 !== 2) { echo true; } ? For the record, I didn’t deny the question...– gustavox
@gustavox that’s right, thank you for helping me!. About the negatives, well, they do not harm me but the community.
– Vinícius Lara
Okay, but read the @rray response carefully, because it explains why it’s not working before and gives great tips on operating operators ( that even was very useful to me... I gave +1 in his answer, but now I saw that they gave a negative :/ that tbm was not me! obv).
– gustavox