I don't know what to do with the probability draw - php

Question

I am currently giving a score of one or more people and choosing to draw more than one person based on the score. However, there is still a runtime error and is not being resolved. Please let me know how to this problem solve.
this is my code:
$selectChildrens = array();
for($i=0;$i<$recuTotal;$i++){
$random = rand(0,sizeof($childSelectArray)-1);
$selectChild = $childSelectArray[$random];
$sameCheck = 0;
if(sizeof($selectChildrens) == 0){
array_push($selectChildrens,$selectChild);
while(($key = array_search($selectChild,$childSelectArray)) != NULL){
unset($childSelectArray[$key]);
}
$recuTotal—;
$i=0;
}else{
array_push($selectChildrens,$selectChild);
while(($key2 = array_search($selectChild,$childSelectArray)) != NULL){
unset($childSelectArray[$key2]);
}
$recuTotal—;
$i=0;
}
}

Answer 1

I see that your attempt to decrement $recuTotal is not using correct syntax.
Use this line instead: $recuTotal--
You are using a long dash, but need two hyphens.
As for your array_search() lines, I always use: !==false though I'm not sure it matters.
Lastly, you can use !sizeof($selectChildrens) as a shorter if statement.
Though I'll admit I didn't fully comb your code to see what it is doing, this is a DRYer code block that will perform the same way:
$selectChildrens = array();
for($i=0;$i<$recuTotal;$i++){
$random = rand(0,sizeof($childSelectArray)-1);
$selectChild = $childSelectArray[$random];
$sameCheck = 0;
array_push($selectChildrens,$selectChild);
while(($key=array_search($selectChild,$childSelectArray))!==false){
unset($childSelectArray[$key]);
}
$recuTotal--;
$i=0;
}