关于phpfiber的信息

php str_replace()函数的用法，有那些参数？

请下载PHP参考手册CHM版，里边有详细的说明，先摘录如下

str_replace

(PHP 4, PHP 5)

str_replace — Replace all occurrences of the search string with the replacement string

说明

mixed str_replace ( mixed $search, mixed $replace, mixed $subject [, int $count] )

This function returns a string or an array with all occurrences of search in subject replaced with the given replace value.

If you don't need fancy replacing rules (like regular expressions), you should always use this function instead of ereg_replace() or preg_replace().

参数

If search and replace are arrays, then str_replace() takes a value from each array and uses them to do search and replace on subject. If replace has fewer values than search, then an empty string is used for the rest of replacement values. If search is an array and replace is a string, then this replacement string is used for every value of search. The converse would not make sense, though.

If search or replace are arrays, their elements are processed first to last.

search

replace

subject

If subject is an array, then the search and replace is performed with every entry of subject, and the return value is an array as well.

count

注意: If passed, this will hold the number of matched and replaced needles.

返回值

This function returns a string or an array with the replaced values.

Php怎么判断协程是否执行完毕

最传统的做法是lockfile。

若lockfile存在，说明前一次的脚本没有结束。

php的协程是新引入的Fiber类的实例，该类的构造方法接受一个callable类型的参数。这个参数可以是匿名函数、函数变量或者实现了invoke的对象。

callable类型可以接收参数，该参数在调用Fiber实例的start方法时传入。

php代码中 $b = &$a是什么意思

相当于$b是$a这个变量的别名~

你改变$a的值，$b的值也会自动变

你变$b的值，$a的值也会自动变~