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How to crop an image in OpenCV using Python
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roi = im[y1:y2, x1:x2]
here is a comprehensive resource on numpy array indexing and slicing which can tell you more about things like cropping a part of an image. images would be stored as a numpy array in opencv2.
:)
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What is the difference between single-quoted and double-quoted strings in PHP?
I'm a little confused why I see some code in PHP with string placed in single quotes and sometimes in double quotes.
12 Ans...
What is causing “Unable to allocate memory for pool” in PHP?
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More info for this APC setting: php.net/apc.configuration#ini.apc.mmap-file-mask
– mikeytown2
Mar 5 '12 at 22:49
2
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Send attachments with PHP Mail()?
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I agree with @MihaiIorga in the comments – use the PHPMailer script. You sound like you're rejecting it because you want the easier option. Trust me, PHPMailer is the easier option by a very large margin compared to trying to do it yourself with PHP's built-in mail() function...
How can I set the request header for curl?
How would I pass multiple values in the header for a curl request?
3 Answers
3
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Check if database exists in PostgreSQL using shell
...to tell me about whether it is possible to use shell to check if a PostgreSQL database exists?
12 Answers
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How do I see the extensions loaded by PHP?
It's got to be somewhere in the phpinfo() dump, but I just don't know where. Is it supposed to be under the "Additional Modules" section? Somewhere else? I'm trying to figure out why some extensions don't appear to be loaded, but I don't even know where I should be looking.
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How do I request a file but not save it with Wget? [closed]
I'm using Wget to make http requests to a fresh web server. I am doing this to warm the MySQL cache. I do not want to save the files after they are served.
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php：获取数组第一个值 - 更多技术 - 清泛网 - 专注C/C++及内核技术
php：获取数组第一个值自PHP 5.4版本后可以使用[ ]来取数据指定位置的元素，索引从0开始，即$arr[0]取数组第一个值。不过为了兼容性，建议还是采取reset(),current(),next()等函数来取数组中的值，reset($arr)后current($arr)取第一个值。自...
PHP优化杂烩 - 更多技术 - 清泛网 - 专注C/C++及内核技术
PHP优化杂烩讲 PHP 优化的文章往往都是教大家如何编写高效的代码，本文打算从另一个角度来讨论问题，教大家如何配置高效的环境，如此同样能够达到优...讲 PHP 优化的文章往往都是教大家如何编写高效的代码，本文打算从另...