Vous avez cherché: real variable function (Anglais - Chinois (simplifié))

variable function arguments
=ד e-2. variable function arguments

variable functions
±䁿º¯ʽ

it is not possible to use echo() in a variable function context.
echo() is not actually a function (it is a language construct) so you are not required to use parentheses with it. in fact, if you want to pass more than one parameter to echo, you must not enclose the parameters within parentheses. it is not possible to use echo() in a variable function context.

php supports the concept of variable functions.
±䁿º¯ʽ

you can also call an object 's method by using the variable functions feature.
?php class foo {function var() {$name = 'bar'; $this- $name(); // this calls the bar() method} function bar() {echo "this is bar";}} $foo = new foo(); $funcname = "var"; $foo- $varname(); // this calls $foo- var()?

for instance, you can prepend it to variables, function and include() calls, constants, and so forth.
ע: ´펳¿ؖƇ°׺¡°@¡±²»»ᆁ±ν⎶´펳µĐŏ¢¡£

an alternative to a monetary policy fixated on attaining an inflation rate in low single digits is a macroeconomic strategy that targets those real variables that are important for a particular country.
可采取别一种货币政策，不是旨在实现一位数低通货膨胀，而是针对具体国家的重要实际变数推行某种宏观经济战略。

30. mitigating uncertainty in monetary policy by, for example, tying interest rate changes to movements in real variables such as real output growth or employment can also enhance transparency in policy rate setting, reduce uncertainty and encourage firms to invest in long-term projects.
30. 减少货币政策的不确定性(例如，通过将利率变动与实际产出增长或就业等实际变量的变动联系在一起)也可提高政策利率制定的透明度，减少不确定性，鼓励公司投资长期项目。