PHP basic Trap question (variable assignment) _php tips

Copy Code code as follows:

<?php
$a = 3;
$b = 6;
if ($a =5| | $b =7) {
$a + +;
$b + +;
}
Var_dump ($a, $b);

Trap A

$a=5, $b = 7 as the $a==5, $b ==7
Error Result: 3,6

Trap Two

The precedence of the operator that the $a=5 assignment succeeded $b=7 not executed
Error Result: 6,7

Correct understanding

Traps are the precedence of operators, and the assignment operator (=) has the lowest precedence, so the correct understanding should be
$a = (5| | $b =7)
Correct result: true,7

Upgrade a bit
Variant one

Copy Code code as follows:

$a = 3;
$b = 6;
$c = 1;
if ($a =5| | $b =7 && $c =10) {
$a + +;
$b + +;
}
Var_dump ($a, $b, $c);

Variant two

Copy Code code as follows:

$a = 3;
$b = 6;
$c = 1;
if ($a =0| | $b =7 && $c =10) {
$a + +;
$b + +;
}
Var_dump ($a, $b, $c);

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