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共127节

3.03 自增运算符

<?php

//自增、自减运算符++，--

//1、前自增，先自增，再参与运算

$x1=10;

echo "x1自增前结果".var_dump($x1);

echo "<br>";

echo "<br>";

$x2=10;

echo "x2前自增结果".var_dump(++$x2);

echo "<br>";

echo "x2前自制后变量结果".var_dump($x2);

echo "<br>";

echo "<br>";

$x3=10;

echo "x3前自增运算后结果".var_dump(++$x3-3);

echo "<br>";

echo "x3前自增后变量结果".var_dump($x3);

echo "<br>";

echo "<br>";

echo "<br>";

//2、后自增，先运算，再参与自增

$y1=10;

echo "y1自增前结果".var_dump($y1);

echo "<br>";

echo "<br>";

$y2=10;

echo "y2后自增结果".var_dump($y2++);

echo "<br>";

echo "y2后自增后变量结果".var_dump($y2);

echo "<br>";

echo "<br>";

$y3=10;

echo "y3后自增运算后结果".var_dump($y3++-3);

echo "<br>";

echo "y3后自增后变量结果".var_dump($y3);

echo "<br>";

?>

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