在PHP数组中出现致命错误

Question

$all = array($stu_quiz_1, $stu_quiz_2, $stu_quiz_3);

$length = count($all);

$low = 10;

$lowest = 0;

for($i = 0; $i<$length; $i++){

if($all($i)<= $low){ // line 34

    $lowest = all($i);

}
else{
    continue;
}
return $lowest;
}

I am new at php so please help me to find it. I just want to get lowest value from this code. I have three values like $stu_quiz_1 = 20 , and so on ...it shows:

Fatal error: Function name must be a string in C:\\xampp\\install\\htdocs\\just\\quiz_handle.php on line 34

Answer 1

if($all($i)<= $low){ // line 34

$all is not a function so you can't use parentheses. You'll have to use square brackets [] to access the array value.

Answer 2

伙计...不是$all($i) ，而是$all[$i] 。

Answer 3

Assuming your function is called all then your if clause should be called like below

if(all($i)<= $low){ // line 34

Note the missing $ from the beginning, thus the name is a string and not a variable.

Answer 4

This line :

$lowest = all($i);

Means that you're calling the function all() with $i as a parameter.

But you $all is actually an array not a function so to access an element of an array you use [] .

So you have to change it to :

$lowest = $all[$i];

Answer 5

First: Change $all($i) to $all[$i] (on line 34)

Second: Change $lowest = all($i); (below the line 34) with $lowest = $all[$i]; . In this you were missing a $ sign in front of all and $i was to be kept inside [] because $all is a variable (containing an array).

Answer 6

To simply get highest or lowest values from an array there are some perfectly suited functions built into the core of PHP - namely max and min .

$all=array( 0,1,23,99,34,838 );

$lowest = min( $all );
$highest= max( $all );

echo $lowest,', ', $highest;
/* output: 0, 838 */