2024年6月2日 · This means that what is on the left side of it will have a corresponding value of what is on the right side of it in array context. This can be used to set values of any acceptable type into a corresponding index of an array. The index can be …

It means that the language itself will try to convert data types, whenever needed. echo 4 + "2"; // output is 6 The output is integer value 6, because + is the numerical addition operator in PHP, so if you provide operands with other data types to it, PHP will first convert them to their appropriate type ("2" will be converted to 2) and then ...

2010年3月4日 · I am confused with & and &&. I have two PHP books. One says that they are same, but the another says they are different. I thought they are same as well. Aren't they same?

2016年6月23日 · (related)variable variables with PHP's Superglobal arrays – LF-DevJourney. Commented Nov 13, 2019 at 7:48.

That's part of the printf method. Those are placeholders for the variables that follow. %d means treat it as a number. %s means treat it as a string. The list of variables that follow in the function call are used in the order they show up in the preceding string.

2009年5月8日 · Thankfully the upcoming PHP7 has at least paved the way to sorting this mess out by means of turning most of these things into catchable exceptions (by means of a new Throwable interface), giving a much more expressive and absolute way to distinguish and properly hand both real problems and advisory messages –

2008年9月24日 · On PHP versions prior 5.4.0RC8, there were a third value possible for PHP_EOL: "\r" (on MacOSX servers). It was wrong and has been fixed on 2012-03-01 with bug 61193 . As others already told you, you can use PHP_EOL in any kind of output (where any of these values are valid - like: HTML, XML, logs...) where you want unified newlines .

the ".=" operator is a string operator, it first converts the values to strings; and since "." means concatenate / append, the result is the string "120". Share Improve this answer

2009年11月18日 · When one types in the prefix increment, one says ++x. The position of the ++ is important here. Saying ++x means to increment (++) first then return the value of x, thus we have ++x. The postfix increment works conversely. Saying x++ means to return the value of x first then increment (++) it after, thus x++.

2011年8月3日 · there are four types of strings available in php. They are single quotes ('), double quotes (") and Nowdoc (<<<'EOD') and heredoc(<<<EOD) strings. you can use both single quotes and double quotes inside heredoc string. Variables will be expanded just as double quotes. nowdoc strings will not expand variables just like single quotes.