This article mainly introduces the PHP error suppressor @ parsing and operator priority. It has a certain reference value. Now I share it with everyone. Friends in need can refer to it
PHP Support An error control operator: @. When placed before a PHP expression, any error message that expression may produce is ignored.
Operator precedence
/** * 下列程序中请写出打印输出的结果 * <?php * * $a = 0; * $b = 0; * * if ($a = 3 > 0 || $b = 3 > 0) * { * $a++; * $b++; * echo $a. "\n"; * echo $b. "\n"; * } */ $a = 0; $b = 0; // 优先级顺序 > || = if ($a = 3 > 0 || $b = 3 > 0) { $a++; $b++; echo $a. "\n"; echo $b. "\n"; }
Output: 1 1
($a=true,$b=1)
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