php函数形参传值与传引用

分类: IT文章 • 2023-01-12 00:32:10

传值

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function example( $m ){

$m = $m * 5 + 10;

echo "在函数内：$m = ".$m;

}

$m = 1;

example( $m ) ;

echo "<p>在函数外：$m = $m <p>" ;

传引用

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function example( &$m ){
$m = $m * 5 + 10;
echo "在函数内：$m = ".$m;
}
$m = 1;
example( $m ) ;
echo "<p>在函数外：$m = $m <p>" ;