为什么这段代码不回显0
$email = "test@example.com";
$ending = "com";
$email = preg_replace('/[^A-Za-z0-9'-]/', '', $email);
echo substr_compare($email, $ending, strlen($ending)-strlen($email), strlen($ending));
我期待0，每个文档
如果您想检查是否以"com"结尾
读一读:PHP中的startsWith()和endsWith()函数
但是如果你只想调试结果:
尝试将整数转换为字符串以正确输出结果。
echo (string)substr_compare($email, $ending, strlen($ending)-strlen($email), strlen($ending));
或做的事:
$result = substr_compare($email, $ending, strlen($ending)-strlen($email), strlen($ending));
var_dump($result); // or echo (string)$result;