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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...
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还原MongoDB中Decimal类型数据 - 更多技术 - 清泛网 - 专注C/C++及内核技术

还原MongoDB中Decimal类型数据问题描述:由于MongoDB没有Decimal类型,我们要将C#的Decimal类型数据存入MongoDB,只能转换为Double类型存储。但是,取出来的数据(原数据...问题描述: 由于MongoDB没有Decimal类型,我们要将C#的Decimal类型数...
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Maximum execution time in phpMyadmin

When I try to execute (some) queries in phpMyadmin I get this error 12 Answers 12 ...
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How can I add a PHP page to WordPress?

I want to create a custom page for my WordPress blog that will execute my PHP code in it, whilst remaining a part of the overall site CSS/theme/design. ...
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What is causing “Unable to allocate memory for pool” in PHP?

... 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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HTML.ActionLink vs Url.Action in ASP.NET Razor

... @Html.ActionLink("link text", "someaction", "somecontroller", new { id = "123" }, null) generates: <a href="/somecontroller/someaction/123">link text</a> and Url.Action("someaction", "somecontroller", new { id = "123" }) generates: /somecontroller/someaction/123 There is also Ht...
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Compare floats in php

I want to compare two floats in PHP, like in this sample code: 16 Answers 16 ...
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SQL update fields of one table from fields of another one

...('a.' || quote_ident(column_name), ',') || ') FROM a WHERE b.id = 123 AND a.id = b.id' FROM information_schema.columns WHERE table_name = 'a' -- table name, case sensitive AND table_schema = 'public' -- schema name, case sensitive AND column_name <> 'id' -...
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Showing all errors and warnings [duplicate]

... Display errors could be turned off in the php.ini or your Apache configuration file. You can turn it on in the script: error_reporting(E_ALL); ini_set('display_errors', '1'); You should see the same messages in the PHP error log. ...
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How to solve PHP error 'Notice: Array to string conversion in…'

I have a PHP file that tries to echo a $_POST and I get an error, here is the code: 5 Answers ...