isset trong php

YOU.com answered on September 12, 2023 Popularity 3/10 Helpfulness 1/10

answer isset trong php

isset trong php

Comment

// Example usage of isset function
$var1 = 'Hello';
$var2 = null;

// Check if $var1 is set and not null
if (isset($var1)) {
    echo 'Variable $var1 is set.';
} else {
    echo 'Variable $var1 is not set or null.';
}

// Check if $var2 is set and not null
if (isset($var2)) {
    echo 'Variable $var2 is set.';
} else {
    echo 'Variable $var2 is not set or null.';
}

Popularity 3/10 Helpfulness 1/10 Language php

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Contributed on Sep 12 2023

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isset trong php

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