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搭建高可用mongodb集群（一）——配置mongodb - 大数据 & AI - 清泛网 - 专...
...edTo: Sun Nov 17 2013 16:04:02 GMT+0800 (CST)
= -54 secs ago (-0.01hrs)
到此主从结构的mongodb搭建好了。
故障转移测试，现在两台服务器如果主服务器挂掉了，从服务器可以正常运转吗？
b、如果从服务器挂掉，主服务器还...
How to check if an array value exists?
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You could use the PHP in_array function
if( in_array( "bla" ,$yourarray ) )
{
echo "has bla";
}
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Twitter image encoding challenge [closed]
...ing it into a character via hex conversion.
Characters: 133
Time: A few seconds
v2 decoded http://www.warriorhut.org/graphics/svg_to_unicode/so-logo-decoded-v2.png After encoding and decoding (version 2)
As you can see there are some artifacts this time. It isn't a limitation of the method but ...
How to open a local disk file with JavaScript?
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Just one sec, when I reload the same last file, the content doesn't change (I say about its content, when I edit the file text). Can you help?
– Hydroper
Oct 11 '15 at 12:49
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Get the first element of an array
... a array "copy" is needed:
array_shift(array_slice($array, 0, 1));
With PHP 5.4+ (but might cause an index error if empty):
array_values($array)[0];
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PHP code to remove everything but numbers
....new-post-login', 'https%3a%2f%2fstackoverflow.com%2fquestions%2f6604455%2fphp-code-to-remove-everything-but-numbers%23new-answer', 'question_page');
}
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In where shall I use isset() and !empty()
...riables and not just values, so isset("foobar") will raise an error. As of PHP 5.5, empty supports both variables and expressions.
So your first question should rather be if isset returns true for a variable that holds an empty string. And the answer is:
$var = "";
var_dump(isset($var));
The typ...
Force SSL/https using .htaccess and mod_rewrite
... can I force to SSL/https using .htaccess and mod_rewrite page specific in PHP.
9 Answers
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What is the best collation to use for MySQL with PHP? [closed]
...gs should be the same, such as MySQL, Apache, the HTML and anything inside PHP.
11 Answers
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Get original URL referer with PHP?
...%2fstackoverflow.com%2fquestions%2f1864583%2fget-original-url-referer-with-php%23new-answer', 'question_page');
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