小编Jor*_*dan的帖子

$sql = "SELECT *
        FROM `likes`
        WHERE `pid` = $pid";

$result = $conn->query($sql);

if ($result->num_rows > 0) {

$likers = array();

while($row = $result->fetch_assoc()) {
    $likers[] = $row['uid'];
    echo implode(", ", $likers);
}

} else {
    return "Be the first to like this status...";
}

例如,它应该显示如果查询在3行结果与用户ID下面:21,20,44

它应显示:21,20,44 但它显示:2121,20,44 看它如何显示第一个值？

另一个例子:50,60,70 但显示:5050,60,70

有什么方法可以解决？提前致谢

我最近尝试将Firebase添加到我的应用程序中.使用Cocoapods我做了一个

pod init

和a

pod install

这是我的Podfile:

    # Uncomment the next line to define a global platform for your project
# platform :ios, '9.0'

target 'A' do
  # Comment the next line if you're not using Swift and don't want to use dynamic frameworks
  use_frameworks!

  # Pods for A
pod ‘Firebase’
end

在尝试构建我的应用程序时,我收到以下错误:

Apple Mach-O链接器错误组

Ld /Users/jordanfrancis/Library/Developer/Xcode/DerivedData/A-dpnxkkawmymjqihivnbvuskouynh/Build/Products/Debug-iphonesimulator/A.app/A normal x86_64 cd/Users/jordanfrancis/Desktop/A export IPHONEOS_DEPLOYMENT_TARGET = 10.2 export PATH =" /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/usr/bin:/Applications/Xcode.app/Contents/Developer/usr/bin:/usr/local/bin:/usr/bin: /斌:/ usr/sbin目录:/ sbin目录" /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang -arch x86_64的-isysroot /Applications/Xcode.app/Contents/Developer/Platforms /iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator10.2.sdk -L/Users/jordanfrancis/Library/Developer/Xcode/DerivedData/A-dpnxkkawmymjqihivnbvuskouynh/Build/Products/Debug-iphonesimulator -F/Users/jordanfrancis/Library/Developer/Xcode/DerivedData/A-dpnxkkawmymjqihivnbvuskouynh/Build/Products/Debug-iphonesimulator -F/Users/jordanfrancis/Library/Developer/Xcode/DerivedData/A-dpnxkkawmymjqihivnbvuskouynh/Build/Products/Debug-iphonesimulator/GoogleToolboxForMac -F/Users/jordanfrancis/Desktop/A/Pods/FirebaseAnalytics/Frameworks/frameworks …