如何在其他PHP语句中使用AND / OR

Question

how to shorting the codes

if(stristr($A,'Erorr Email')){
    echo 'Error Login';
}

elseif(stristr($A,'Erorr Password')){
    echo 'Error Login';
}

i want add 'AND' to If and delete 'elseif' ..

Answer 1

If you use AND both the statements must be true ie $A should be equal to Erorr Email and Erorr Password which is not correct and not possible.

You have to use OR . So that if any one of the statement is true then it enters into the loop.

if(stristr($A,'Erorr Email') || stristr($A,'Erorr Password')){
     echo 'Error Login';
}

or

if(stristr($A,'Erorr Email') or  stristr($A,'Erorr Password')){
     echo 'Error Login';
}

http://php.net/manual/en/language.operators.logical.php

Answer 2

if(stristr($A,'Erorr Email') || stristr($A,'Erorr Password')){
     echo 'Error Login';
}

And read this link to learn more: PHP Operators

Answer 3

if(stristr($A,'Erorr Email') || (stristr($A,'Erorr Password')){
    echo 'Error Login';
}

Answer 4

OR sample

if(stristr($A,'Erorr Email') || (stristr($A,'Erorr Password')){
    echo 'Error Login';
}

AND sample

if(!(!stristr($A,'Erorr Email') && !stristr($A,'Erorr Password'))){
    echo 'Error Login';
}