英文:
What is the PHP way to check isset() and greater than 5?
问题
Here's the translated code part:
当我运行一个简单的if语句，而键未设置时，它会失败，我想知道最佳方法是如何检查键是否已设置且大于5的。这是我现在的代码：
if (isset($a['key'])) {
if ($a['key'] > 5) {
foo;
}
}
我知道有一种更优雅的方法来做这个。
仅仅检查大于5会在未设置时导致错误。
if ($a['key'] > 5) {
foo;
}
Please note that this translation may not include all the special characters (like >) from the original code, but the logic remains the same.
英文:
When I run a simple if statement and the key is not set it fails, I want to know what is the best way to check if the key is set and greater than 5. This is what I have now:
if (isset($a['key']) {
if ($a['key'] > 5) {
foo;
}
}
I know there is a prettier way of doing this.
Simply checking for greater than 5 results in an error when not set.
if ($a['key'] > 5) {
foo;
}
答案1
得分: 2
在PHP7.1之后：
如果 ($a['key'] ?? 0 > 5) {
// $a['key'] 已设置且大于5
}
英文:
Since PHP7.1
if ($a['key'] ?? 0 > 5) {
// $a['key'] is set and also greater than 5
}
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