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Home Backend Development PHP Tutorial php-Is my understanding correct? The reason why $b outputs 1 is because $a defaults to 0?

php-Is my understanding correct? The reason why $b outputs 1 is because $a defaults to 0?

Aug 10, 2016 am 08:49 AM
php

  php

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    <?phpfunction test (&$b){    $b++;    echo $b.'';

    }test($a);$a=100;echo $a;

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This code has been changed to better understand the changes in $a:

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<?php

function test (&$b){

$b++;

echo $b.'

';

}

test($a);

echo $a;

$a=100;

echo $a;

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Yes, php will initialize a default value for unassigned code. For integers, This value is 0

The initialization value is the same as java.
What should I pay attention to when studying? I think the most important thing is to apply what you have learned, practice more, and write some code that has practical significance. Don’t write too much helloworld-level code, let alone go overboard and create some weird test programs, and pay more attention to real-world problems. .

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