<?php
$y=false;
if (is_bool($y))
echo 'This is a boolean type.';
else
echo 'This is not a boolean type.';
?>
输出
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Warning: get_headers(): SSL operation failed with code 1. OpenSSL Error messages:
error:14090086:SSL routines:ssl3_get_server_certificate:certificate verify failed in /mydata/web/wwwshanhubei/web/wp-content/themes/shanhuke/single.php on line 57
Warning: get_headers(): Failed to enable crypto in /mydata/web/wwwshanhubei/web/wp-content/themes/shanhuke/single.php on line 57
Warning: get_headers(https://static.shanhubei.com/qrcode/qrcode_viewid_37948.jpg): failed to open stream: operation failed in /mydata/web/wwwshanhubei/web/wp-content/themes/shanhuke/single.php on line 57
