Php 收集if函数中的所有（正确的）

我在这里准备了条件函数中的一些变量

<?php
if($one !== "")
    {
        $array = "Inner Join One on One.id = Number.id"; 
    }

if($two !== "")
    {
        $array = "Inner Join Two on Two.id = Number.id"; 
    }

if($three !== "")
    {
        $array = "Inner Join Three on Three.id = Number.id"; 
    }

if($four !== "")
    {
        $array = "Inner Join Four on Four.id = Number.id"; 
    }
?>

---

---

现在我想检查加入所需的内容。我想收集if函数中的所有（正确的）

我希望所有人都明白我在这里要做什么。提前感谢您的帮助。

试试-

$array = array();
if($one !== "")
    {
        $array[] = "Inner Join One on One.id = Number.id"; 
    }

if($two !== "")
    {
        $array[] = "Inner Join Two on Two.id = Number.id"; 
    }

if($three !== "")
    {
        $array[] = "Inner Join Three on Three.id = Number.id"; 
    }

if($four !== "")
    {
        $array[] = "Inner Join Four on Four.id = Number.id"; 
    }

$str = implode(" ", $array); // Can use other delimiters. here it is blankspace

试试-

$array = array();
if($one !== "")
    {
        $array[] = "Inner Join One on One.id = Number.id"; 
    }

if($two !== "")
    {
        $array[] = "Inner Join Two on Two.id = Number.id"; 
    }

if($three !== "")
    {
        $array[] = "Inner Join Three on Three.id = Number.id"; 
    }

if($four !== "")
    {
        $array[] = "Inner Join Four on Four.id = Number.id"; 
    }

$str = implode(" ", $array); // Can use other delimiters. here it is blankspace

试试-

$array = array();
if($one !== "")
    {
        $array[] = "Inner Join One on One.id = Number.id"; 
    }

if($two !== "")
    {
        $array[] = "Inner Join Two on Two.id = Number.id"; 
    }

if($three !== "")
    {
        $array[] = "Inner Join Three on Three.id = Number.id"; 
    }

if($four !== "")
    {
        $array[] = "Inner Join Four on Four.id = Number.id"; 
    }

$str = implode(" ", $array); // Can use other delimiters. here it is blankspace

试试-

$array = array();
if($one !== "")
    {
        $array[] = "Inner Join One on One.id = Number.id"; 
    }

if($two !== "")
    {
        $array[] = "Inner Join Two on Two.id = Number.id"; 
    }

if($three !== "")
    {
        $array[] = "Inner Join Three on Three.id = Number.id"; 
    }

if($four !== "")
    {
        $array[] = "Inner Join Four on Four.id = Number.id"; 
    }

$str = implode(" ", $array); // Can use other delimiters. here it is blankspace