Question

嗨我尝试打印使用数组匹配字符串.. 问题是......它只打印 BTC打印 如果可能的话，还建议使用数组参数匹配的方法

Output Needed:
    BTC print
    ETH print
    DOGE print
    WAVES print

代码：

<?php 
$coins = array("BTC", "ETH", "DOGE", "WAVES"); 

foreach ($coins as $coin) {

    $string = 'BTC';    
    if (strpos($string, $coin) !== FALSE) { 
        echo "BTC print"; 
        return true;
    }
    $string1 = 'ETH';   
    if (strpos($string1, $coin) !== FALSE) { 
        echo "ETH print"; 
        return true;
    }
    $string2 = 'DOGE';  
    if (strpos($string2, $coin) !== FALSE) { 
        echo "DOGE print"; 
        return true;
    }
    $string3 = 'WAVES'; 
    if (strpos($string3, $coin) !== FALSE) { 
        echo "WAVES print"; 
        return true;
    }
}
echo "Not found!";
return false;

Answer 1

返回会破坏你的循环。试试这个：

$coins = array("BTC", "ETH", "DOGE", "WAVES"); 

$found = false;
foreach ($coins as $coin) {
    $string = 'BTC';    
    if (strpos($string, $coin) !== FALSE) { 
        echo "BTC print"; 
        $found = true;
    }
    $string1 = 'ETH';   
    if (strpos($string1, $coin) !== FALSE) { 
        echo "ETH print"; 
        $found = true;
    }
    $string2 = 'DOGE';  
    if (strpos($string2, $coin) !== FALSE) { 
        echo "DOGE print"; 
        $found = true;
    }
    $string3 = 'WAVES'; 
    if (strpos($string3, $coin) !== FALSE) { 
        echo "WAVES print"; 
        $found = true;
    }
}
if (!$found) {
    echo "Not found!";
}

如果你在一个函数中，那么你可以添加：

return $found ;

Answer 2

如果您的打印行仅在硬币名称上有所不同，您可以使用简单的循环：

$coins = ['BTC', 'ETH', 'DOGE', 'WAVES'];

foreach ($coins as $coin) {
    echo "$coin print", PHP_EOL;
}

这是the demo。

PHP foreach传递数组

2 个答案: