简化的if语句(Ternary Operator):使用? :来简化if-else语句。例如:$age = ($isAdult ? 'Adult' : 'Child');可变变量(Variable variables):使用$$来动态创建变量。例如:$name = 'age'; $$name = 20;数组简写(Array Syntax Shorthand):使用[]来代替array()。例如:$arr = ['apple', 'banana', 'orang...
setcookie('lang', $lang); //it's stored in a cookie so it can be reused } elseif (isset($_COOKIE['lang']) && valid($_COOKIE['lang'])) { // if the cookie is present instead, let's just keep it $lang = $_COOKIE['lang']; //you should sanitize this! } elseif (isset($...
setcookie('lang', $lang); //it's stored in a cookie so it can be reused } elseif (isset($_COOKIE['lang']) && valid($_COOKIE['lang'])) { // if the cookie is present instead, let's just keep it $lang = $_COOKIE['lang']; //you should sanitize this! } elseif (isset($...
phpif($argc!=2){echo"Usage: php hello.php [name].\n";exit(1);}$name=$argv[1];echo"Hello,$name\n"; PHP 会在脚本运行时根据参数设置两个特殊的变量,$argc是一个整数,表示参数个数,$argv是一个数组变量,包含每个参数的值, 它的第一个元素一直是 PHP 脚本的名称,如本例中为hello.php。 命令...
{ if ($password === 'password') { $this->setValidationFailedText('Password is too weak'); return false; } else if (strlen($password) <= 20) { $this->setValidationFailedText('Password is not long enough'); return false; } return true; }) ->ask(); var_dump($result->fetch())...
elseif(round($difference/3600, 2) >= 3) { return "Just a few hours ago.."; } elseif(round($difference/3600, 2) >= 8) { return "About half a day ago..."; } elseif(round($difference/3600, 2) < 1) { return "Less than an hour ago..."; } ...
= shorthand tag, which can be ; used regardless of this directive. ; Default Value: On ; Development Value: Off ; Production Value: Off ; https://php.net/short-open-tag short_open_tag = Off ; The number of significant digits displayed in floating point numbers. ; https://php.net/...
IF/ELSEPHP has several conditional processing expressions such as for, while, switch, andforeachbut the most common is theif/elseexpression. Visual Basic .NET has very similar constructs with similar syntax. Code Sample 4 provides a comparison of equivalent conditional logic in PHP and Visual ...
shorthand.php <?php $words = [ "Prague", "111978", "terry2", "mitt##" ]; $pattern = "/\w{6}/"; foreach ($words as $word) { if (preg_match($pattern, $word)) { echo "$word matches the pattern\n"; } else { echo "$word does not match the pattern\n"; ...
PHP One Line If Statement – Single Line If – Shorthand If When writing PHP, I don’t know why but I keep having to research thePHP one line if statementagain and again. I just can’t seem to remember it. Totally bizarre. There are many names for this construct. Theone liner ifis...