当计数器达到 5 时中断 Foreach | PHP

编程问答 2022-05-31

问题描述

我试图在 $counter 达到 5 时停止 foreach，但我不能，我试图改变“break;”放置，我在 if 中尝试/捕获，但没有成功，我不断获得 103 场比赛（图片）而我只想要 5 场

.........
    $leagues= $api->getLeagueEntries("RANKED_SOLO_5x5","Gold",'I');
    
     $counter = 0;
    
     foreach ($leagues as $t=> $op) {
    
    if (++$counter < 5) {
    
      
    
    }
                try {
                    $account_id = $api->getSummoner($op->summonerId);
                    $date = time();
                    $ab = $api->getMatchlistByAccount($account_id->accountId,"420",null,$date,NULL,null);
    
    
                    echo "<pre>" ; var_dump($ab);   echo "<pre>" ;
                      break;
                } catch (Exception $e) { }
            }

enter image description here

解决方法

$leagues 是一个数组，因此只需逐个元素地遍历数组，并在完成足够的操作后停止：

$limit = min(5,count($leagues));  // just in case there's fewer than five.
for ($i = 0; $i<limit; $i++) {
    $account_id = $api->getSummoner($leagues[$i]->summonerId);
    $date = time();
    $ab = $api->getMatchlistByAccount($account_id->accountId,"420",null,$date,NULL,null);
    echo "<pre>" ; var_dump($ab);   echo "<pre>" ;
}
,

放弃尝试不是一个好主意。您可以将中断放在 else 分支中吗？

import {AfterContentInit,AfterViewInit,Component,Input,OnInit,ViewChild} from '@angular/core';
import {Client,ClientStatus} from '@models/client.model';
import {ClientService} from '@services/client.service';
import {MatSort,Sort} from '@angular/material/sort';
import {MatTableDataSource} from '@angular/material/table';

@Component({
  selector: 'app-table-entries',templateUrl: './table-entries.component.html',styleUrls: ['./table-entries.component.scss']
})
export class TableEntriesComponent implements OnInit,AfterViewInit {
  @Input() entries: Client[] = [];
  displayedColumns: string[] = ['expectedDate','description.id','priority' ];
  @ViewChild(MatSort,{static: true}) sort: MatSort;
  sortableEntries: MatTableDataSource<Client>;

  constructor( clientService: ClientService ) {}
  ngOnInit(): void {
      this.sortableEntries = new MatTableDataSource<Client>( this.entries );
  }

  ngAfterViewInit() {
    this.sort.active = 'expectedDate';
    this.sort.direction = 'asc';
    this.sortableEntries.sort = this.sort;
    this.sortableEntries.sortingDataAccessor = ( client,property) => {
      switch ( property ) {
        case 'description.id': return client.description.id;
        default: return client[property];
      }
    };
  }
}
,

如果您只想返回有限的数据，请尝试 array_slice

echo "<pre>" ; var_dump(array_slice($ab,5));   echo "<pre>" ;
arraysarrayscounterforeach