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How to determine the memory footprint (size) of a variable?

Is there a function in PHP (or a PHP extension) to find out how much memory a given variable uses? sizeof just tells me the number of elements/properties. ...
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Oracle 11.2.0.4 RAC FOR redhat 6.4 - 数据库(内核) - 清泛网 - 专注C/C++及内核技术

... 清除配置 清除完毕 再次创建RAID 自动 当发生问题的时候有冗余 不管怎么设置 3块硬盘只能设置成RAID 1 还有一块不能用 ,太TM的坑爹了 查看阵列卡的配置 我X 缓存0M 你奶奶的配置什么3块硬盘啊,你这么搞IB...
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Submitting a multidimensional array via POST with php

I have a php form that has a known number of columns (ex. top diameter, bottom diameter, fabric, colour, quantity), but has an unknown number of rows, as users can add rows as they need. ...
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How do I add 24 hours to a unix timestamp in php?

...add 24 hours to the timestamp for right now then simply you can do: <?php echo strtotime('+1 day'); ?> Above code will add 1 day or 24 hours to your current timestamp. in place of +1 day you can take whatever you want, As php manual says strtotime can Parse about any English textual datet...
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startsWith() and endsWith() functions in PHP

...rlen($needle)) === 0; } This should be one of the fastest solutions on PHP 7 (benchmark script). Tested against 8KB haystacks, various length needles and full, partial and no match cases. strncmp is a touch faster for starts-with but it cannot check ends-with. ...
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What is the difference between public, private, and protected?

...e property / method will be public. More: (For comprehensive information) PHP Manual - Visibility share | improve this answer | follow | ...
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How can I use break or continue within for loop in Twig template?

...milar behaviour to the built-in break and continue statements like in flat PHP. share | improve this answer | follow | ...
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Is APC compatible with PHP 5.4 or PHP 5.5?

It doesn't seem like APC has been updated to coincide with the php 5.4 release (I wish they would have included APC in PHP core like originally planned). ...
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How to Sort Multi-dimensional Array by Value?

... Try a usort, If you are still on PHP 5.2 or earlier, you'll have to define a sorting function first: function sortByOrder($a, $b) { return $a['order'] - $b['order']; } usort($myArray, 'sortByOrder'); Starting in PHP 5.3, you can use an anonymous func...
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Class 'DOMDocument' not found

...OM extension. You can do so on Debian / Ubuntu using: sudo apt-get install php-dom And on Centos / Fedora / Red Hat: yum install php-xml If you get conflicts between PHP packages, you could try to see if the specific PHP version package exists instead: e.g. php53-xml if your system runs PHP5.3. ...