PHP将变量传递给另一个文件中的函数

index.php

require '../include/FunctionFile.php';
$test = "blah";
myfunction($test);

function myfunction($test){
    global $test;
    echo $test;
}

require '../include/FunctionFile.php';
$test = "blah";
$var=myfunction($test);// assign to vaiable
echo $var;

function myfunction($test){
    return $test;// use return type here
}

FunctionFile.php

require '../include/FunctionFile.php';
$test = "blah";
myfunction($test);

function myfunction($test){
    global $test;
    echo $test;
}

require '../include/FunctionFile.php';
$test = "blah";
$var=myfunction($test);// assign to vaiable
echo $var;

function myfunction($test){
    return $test;// use return type here
}

---

我想将

$test

值传递给myfunction，但看起来它不工作，它什么也不返回，错误日志中什么也不返回。

您的函数需要

返回

值

index.php

require '../include/FunctionFile.php';
$test = "blah";
myfunction($test);

function myfunction($test){
    global $test;
    echo $test;
}

require '../include/FunctionFile.php';
$test = "blah";
$var=myfunction($test);// assign to vaiable
echo $var;

function myfunction($test){
    return $test;// use return type here
}

FunctionFile.php

require '../include/FunctionFile.php';
$test = "blah";
myfunction($test);

function myfunction($test){
    global $test;
    echo $test;
}

require '../include/FunctionFile.php';
$test = "blah";
$var=myfunction($test);// assign to vaiable
echo $var;

function myfunction($test){
    return $test;// use return type here
}

---

您的函数需要返回值

index.php

require '../include/FunctionFile.php';
$test = "blah";
myfunction($test);

function myfunction($test){
    global $test;
    echo $test;
}

require '../include/FunctionFile.php';
$test = "blah";
$var=myfunction($test);// assign to vaiable
echo $var;

function myfunction($test){
    return $test;// use return type here
}

FunctionFile.php

require '../include/FunctionFile.php';
$test = "blah";
myfunction($test);

function myfunction($test){
    global $test;
    echo $test;
}

require '../include/FunctionFile.php';
$test = "blah";
$var=myfunction($test);// assign to vaiable
echo $var;

function myfunction($test){
    return $test;// use return type here
}

你也可以试试这个

myfunction（“args”）；
函数myfunction（$test）{
回声试验；
}

您也可以试试这个

myfunction（“args”）；
函数myfunction（$test）{
回声试验；
}

我知道另一位mate已经提供了解决方案，因此我将为未来方面添加我的答案

假设您有两个函数

getHello（）

和

getbye（）

，它们的定义不同，用途相同

// function one
function getHello(){
    return "Hello";
}

// function two
function getGoodbye(){
    echo "Goodbye";
}

//now call getHello() function
$helloVar = getHello();  

结果：

'Hello' // return 'hello' and stored value in $helloVar

//now call getGoodbye() function
$goodbyeVar = getGoodbye(); 

'Goodbye' // echo 'Goodbye' and not stored in $goodbyeVar

echo $helloVar; // "Hello" 
echo $goodbyeVar; // Goodbye 

'GoodbyeHello'

// now try same example with this:

echo $helloVar; // "Hello" 
//echo $goodbyeVar; // Goodbye 

function myfunction($test){
    //global $test;
    echo $test;
}

function myfunction2($test){
    //global $test;
    return $test;
}

myfunction('test'); // test
myfunction2('test'); // noting

//You need to echo myfunction2() as i mentioned in above.

echo myfunction2('test'); // test

结果：

'Hello' // return 'hello' and stored value in $helloVar

//now call getGoodbye() function
$goodbyeVar = getGoodbye(); 

'Goodbye' // echo 'Goodbye' and not stored in $goodbyeVar

echo $helloVar; // "Hello" 
echo $goodbyeVar; // Goodbye 

'GoodbyeHello'

// now try same example with this:

echo $helloVar; // "Hello" 
//echo $goodbyeVar; // Goodbye 

function myfunction($test){
    //global $test;
    echo $test;
}

function myfunction2($test){
    //global $test;
    return $test;
}

myfunction('test'); // test
myfunction2('test'); // noting

//You need to echo myfunction2() as i mentioned in above.

echo myfunction2('test'); // test

结果：

'Hello' // return 'hello' and stored value in $helloVar

//now call getGoodbye() function
$goodbyeVar = getGoodbye(); 

'Goodbye' // echo 'Goodbye' and not stored in $goodbyeVar

echo $helloVar; // "Hello" 
echo $goodbyeVar; // Goodbye 

'GoodbyeHello'

// now try same example with this:

echo $helloVar; // "Hello" 
//echo $goodbyeVar; // Goodbye 

function myfunction($test){
    //global $test;
    echo $test;
}

function myfunction2($test){
    //global $test;
    return $test;
}

myfunction('test'); // test
myfunction2('test'); // noting

//You need to echo myfunction2() as i mentioned in above.

echo myfunction2('test'); // test

结果应该是相同的，因为

get再见（）

已经

echo'ed

了结果

现在使用您的代码示例：

'Hello' // return 'hello' and stored value in $helloVar

//now call getGoodbye() function
$goodbyeVar = getGoodbye(); 

'Goodbye' // echo 'Goodbye' and not stored in $goodbyeVar

echo $helloVar; // "Hello" 
echo $goodbyeVar; // Goodbye 

'GoodbyeHello'

// now try same example with this:

echo $helloVar; // "Hello" 
//echo $goodbyeVar; // Goodbye 

function myfunction($test){
    //global $test;
    echo $test;
}

function myfunction2($test){
    //global $test;
    return $test;
}

myfunction('test'); // test
myfunction2('test'); // noting

//You need to echo myfunction2() as i mentioned in above.

echo myfunction2('test'); // test

为什么它在您的代码中不起作用？：

'Hello' // return 'hello' and stored value in $helloVar

//now call getGoodbye() function
$goodbyeVar = getGoodbye(); 

'Goodbye' // echo 'Goodbye' and not stored in $goodbyeVar

echo $helloVar; // "Hello" 
echo $goodbyeVar; // Goodbye 

'GoodbyeHello'

// now try same example with this:

echo $helloVar; // "Hello" 
//echo $goodbyeVar; // Goodbye 

function myfunction($test){
    //global $test;
    echo $test;
}

function myfunction2($test){
    //global $test;
    return $test;
}

myfunction('test'); // test
myfunction2('test'); // noting

//You need to echo myfunction2() as i mentioned in above.

echo myfunction2('test'); // test

在分配以下值之前，需要将变量声明为

Global

：

global $test;
$test = "blah"; 

---

我知道另一位mate已经提供了解决方案，因此我正在为未来方面添加我的答案

假设您有两个函数

getHello（）

和

getbye（）

，它们的定义不同，用途相同

// function one
function getHello(){
    return "Hello";
}

// function two
function getGoodbye(){
    echo "Goodbye";
}

//now call getHello() function
$helloVar = getHello();  

结果：

'Hello' // return 'hello' and stored value in $helloVar

//now call getGoodbye() function
$goodbyeVar = getGoodbye(); 

'Goodbye' // echo 'Goodbye' and not stored in $goodbyeVar

echo $helloVar; // "Hello" 
echo $goodbyeVar; // Goodbye 

'GoodbyeHello'

// now try same example with this:

echo $helloVar; // "Hello" 
//echo $goodbyeVar; // Goodbye 

function myfunction($test){
    //global $test;
    echo $test;
}

function myfunction2($test){
    //global $test;
    return $test;
}

myfunction('test'); // test
myfunction2('test'); // noting

//You need to echo myfunction2() as i mentioned in above.

echo myfunction2('test'); // test

结果：

'Hello' // return 'hello' and stored value in $helloVar

//now call getGoodbye() function
$goodbyeVar = getGoodbye(); 

'Goodbye' // echo 'Goodbye' and not stored in $goodbyeVar

echo $helloVar; // "Hello" 
echo $goodbyeVar; // Goodbye 

'GoodbyeHello'

// now try same example with this:

echo $helloVar; // "Hello" 
//echo $goodbyeVar; // Goodbye 

function myfunction($test){
    //global $test;
    echo $test;
}

function myfunction2($test){
    //global $test;
    return $test;
}

myfunction('test'); // test
myfunction2('test'); // noting

//You need to echo myfunction2() as i mentioned in above.

echo myfunction2('test'); // test

结果：

'Hello' // return 'hello' and stored value in $helloVar

//now call getGoodbye() function
$goodbyeVar = getGoodbye(); 

'Goodbye' // echo 'Goodbye' and not stored in $goodbyeVar

echo $helloVar; // "Hello" 
echo $goodbyeVar; // Goodbye 

'GoodbyeHello'

// now try same example with this:

echo $helloVar; // "Hello" 
//echo $goodbyeVar; // Goodbye 

function myfunction($test){
    //global $test;
    echo $test;
}

function myfunction2($test){
    //global $test;
    return $test;
}

myfunction('test'); // test
myfunction2('test'); // noting

//You need to echo myfunction2() as i mentioned in above.

echo myfunction2('test'); // test

结果应该是相同的，因为

get再见（）

已经

echo'ed

了结果

现在使用您的代码示例：

'Hello' // return 'hello' and stored value in $helloVar

//now call getGoodbye() function
$goodbyeVar = getGoodbye(); 

'Goodbye' // echo 'Goodbye' and not stored in $goodbyeVar

echo $helloVar; // "Hello" 
echo $goodbyeVar; // Goodbye 

'GoodbyeHello'

// now try same example with this:

echo $helloVar; // "Hello" 
//echo $goodbyeVar; // Goodbye 

function myfunction($test){
    //global $test;
    echo $test;
}

function myfunction2($test){
    //global $test;
    return $test;
}

myfunction('test'); // test
myfunction2('test'); // noting

//You need to echo myfunction2() as i mentioned in above.

echo myfunction2('test'); // test

为什么它在您的代码中不起作用？：

'Hello' // return 'hello' and stored value in $helloVar

//now call getGoodbye() function
$goodbyeVar = getGoodbye(); 

'Goodbye' // echo 'Goodbye' and not stored in $goodbyeVar

echo $helloVar; // "Hello" 
echo $goodbyeVar; // Goodbye 

'GoodbyeHello'

// now try same example with this:

echo $helloVar; // "Hello" 
//echo $goodbyeVar; // Goodbye 

function myfunction($test){
    //global $test;
    echo $test;
}

function myfunction2($test){
    //global $test;
    return $test;
}

myfunction('test'); // test
myfunction2('test'); // noting

//You need to echo myfunction2() as i mentioned in above.

echo myfunction2('test'); // test

在分配以下值之前，需要将变量声明为

Global

：

global $test;
$test = "blah"; 

---

您的

myfunction

是类的一部分吗？或者只是简单的书写function@urfusion不，这是一个简单的函数。你确定包含函数的文件正确吗？FunctionFile.php的文件路径正确吗？它在我这边起作用了。@RamRaider是的，我确定你的

myfunction

是类的一部分吗？或者只是简单的书写function@urfusion不，这是一个简单的函数。你确定包含函数的文件正确吗？FunctionFile.php的文件路径正确吗？它在我这边起作用了。@RamRaider是的，我确定用它来检查页面

ini\u集合中的错误（'display\u errors'，1）；ini设置（“显示启动错误”，1）；错误报告（E_全部）为之前的回复道歉！这是我的错，它运行良好。。Thanksnice one@Saty:很好的回答使用此选项检查页面
ini\u集合中的错误（“显示错误”，1）；ini设置（“显示启动错误”，1）；错误报告（E_全部）为之前的回复道歉！这是我的错，它运行良好。。谢谢Saty一号：回答得很好