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select count(*) from table of mysql in php
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@eichertc the php interpreter has the variable always internal, as he needs to have the result in memory one way or the other. So your way just makes the code worser to read and maintain, IMHO.
– Tom
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The first day of the current month in php using date_modify as DateTime object
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Requires PHP 5.3 to work ("first day of" is introduced in PHP 5.3). Otherwise the example above is the only way to do it:
<?php
// First day of this month
$d = new DateTime('first day of this month');
echo $d->forma...
Multiple returns from a function
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If only PHP had Perl's wantarray()
– Marc B
Aug 26 '10 at 22:22
8
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Are PHP functions case sensitive?
...gging through some code, and I found some calls to mySQL_fetch_array . Is PHP case sensitive about function names? I recall reading this somewhere but can't seem to find any reference to it.
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Calling closure assigned to object property directly
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As of PHP7, you can do
$obj = new StdClass;
$obj->fn = function($arg) { return "Hello $arg"; };
echo ($obj->fn)('World');
or use Closure::call(), though that doesn't work on a StdClass.
Before PHP7, you'd have to implem...
How to create an array from a CSV file using PHP and the fgetcsv function
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FYI: str_getcsv() is only available from PHP 5.3.0 on. The project I am working on missed it by 1 version DOH! (we are using 5.2.9 atm).
– Jim Ford
Sep 16 '09 at 19:15
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What Does This Mean in PHP -> or => [duplicate]
I see these in PHP all the time but I don't have a clue as to what they actually mean. What does -> do and what does => do. And I'm not talking about the operators. They're something else, but nobody seems to know...
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php出现 Notice: Undefined index: xxx 的解决方法 - 更多技术 - 清泛网 - 专注IT技能提升
php出现 Notice: Undefined index: xxx 的解决方法Php_Notice_Undefined_index方法出现 "Undefined index: xxx "警告的原因：PHP 本身不需要事先声明变量即可直接使用，但是对未声明变量会有提示，最好的办法是使用变量之前先检查变量是否存在。...
php出现 Notice: Undefined index: xxx 的解决方法 - 更多技术 - 清泛网 - 专注IT技能提升
php出现 Notice: Undefined index: xxx 的解决方法Php_Notice_Undefined_index方法出现 "Undefined index: xxx "警告的原因：PHP 本身不需要事先声明变量即可直接使用，但是对未声明变量会有提示，最好的办法是使用变量之前先检查变量是否存在。...
php出现 Notice: Undefined index: xxx 的解决方法 - 更多技术 - 清泛网移...
php出现 Notice: Undefined index: xxx 的解决方法Php_Notice_Undefined_index方法出现 "Undefined index: xxx "警告的原因：PHP 本身不需要事先声明变量即可直接使用，但是对未声明变量会有提示，最好的办法是使用变量之前先检查变量是否存在。...