Symfony 2.按DateTime排序数组

Question

数据阵列：

java.lang.IncompatibleClassChangeError: Class com.google.android.gms.a.b implements non-interface class com.google.android.gms.a.a (declaration of 'com.google.android.gms.a.b' appears in /data/data/com.google.android.gms/app_chimera/chimera-module-root/module-dd5b1d6850a09abe29b143730d133d3d1f4c4971/MapsModule.apk)
at dalvik.system.DexFile.defineClassNative(Native Method)
at dalvik.system.DexFile.defineClass(DexFile.java:240)
at dalvik.system.DexFile.loadClassBinaryName(DexFile.java:233)
at dalvik.system.DexPathList.findClass(DexPathList.java:321)
at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:54)
at java.lang.ClassLoader.loadClass(ClassLoader.java:511)
at java.lang.ClassLoader.loadClass(ClassLoader.java:469)
at com.google.android.gms.maps.internal.h.onTransact(SourceFile:104)
at android.os.Binder.transact(Binder.java:380)
at com.google.android.gms.maps.internal.ah.a(SourceFile:256)
at com.google.android.gms.maps.internal.CreatorImpl.a(SourceFile:82)
at com.google.android.gms.maps.internal.CreatorImpl.b(SourceFile:96)
at com.google.android.gms.maps.internal.ag.onTransact(SourceFile:62)
at android.os.Binder.transact(Binder.java:380)
at com.google.android.gms.maps.a.al.b(Unknown Source)
at com.google.android.gms.maps.q.g(Unknown Source)
at com.google.android.gms.maps.q.a(Unknown Source)
at com.google.android.gms.b.b.a(Unknown Source)
at com.google.android.gms.b.b.a(Unknown Source)
at com.google.android.gms.maps.n.onCreate(Unknown Source)
at android.support.v4.app.Fragment.performCreate(SourceFile:1766)
at android.support.v4.app.FragmentManagerImpl.moveToState(SourceFile:917)
at android.support.v4.app.FragmentManagerImpl.moveToState(SourceFile:1138)
at android.support.v4.app.BackStackRecord.run(SourceFile:740)
at android.support.v4.app.FragmentManagerImpl.execPendingActions(SourceFile:1501)
at android.support.v4.app.FragmentActivity.onStart(SourceFile:551)

树枝的结果：

    $allEvents = [];        
    foreach ($events as $event) {
            $allEvents[] = $event;
    }
    foreach ($user->getEvents() as $event) {
            $allEvents[] = $event;
    }

var_dump allEvents结果：

        return $this->render(
        'MyBundle:User:dashboard.html.twig',
        [   'allEvents' => $allEvents,
            'user' => $user   ]
        );

问题：如何通过计划（有些像ASC或DESC排序）对数组进行排序？

Answer 1

您可以使用PHP的usort功能，如下所示（我已经编辑了答案，让您看得更清楚）：

修改

$allSortedEvents = usort( $allEvents, function( $a, $b ){
    if ( $a->getSchedule() == $b->getSchedule() )
    {
        return 0;
    }
    else
    {
        return ( $a->getSchedule() < $b->getSchedule() ) ? -1 : 1;
    }
});    

发送给Twig：

return $this->render(
    'MyBundle:User:dashboard.html.twig',
    [   'allEvents' => $allSortedEvents,
        'user' => $user   ]
    );