Angular 15/14 Multiple Image Upload with Preview Tutorial with Example

Angular 15/14 multiple image upload with preview; Through this tutorial, i am going to show you how to upload multiple images with preview in Angular 15/14 apps.

Angular 15/14 Multiple Image Upload with Preview Tutorial with Example

Use the below given steps to upload multiple images with preview in Angular 15/14 apps with reactive form:

• Step 1 – Create New Angular App
• Step 2 – Import Module
• Step 3 – Create Image Upload Form on View File
• Step 4 – Update Component ts File
• Step 5 – Create Upload.php File
• Step 6 – Start Angular App And PHP Server

Step 1 – Create New Angular App

Run the following command on it terminal to install angular app:

ng new my-new-app

Step 2 – Import Module

Then, Open app.module.ts file and import HttpClientModule, FormsModule and ReactiveFormsModule to app.module.ts file like following:

import { NgModule } from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';
  
import { AppComponent } from './app.component';
import { FormsModule, ReactiveFormsModule } from '@angular/forms';
  
import { HttpClientModule } from '@angular/common/http';
  
@NgModule({
  declarations: [
    AppComponent
  ],
  imports: [
    BrowserModule,
    FormsModule,
    ReactiveFormsModule,
    HttpClientModule
  ],
  providers: [],
  bootstrap: [AppComponent]
})
export class AppModule { }

Step 3 – Create Multiple Image Upload Form on View File

Go to src/app/app.component.html and update the following code into it:

<h1>Angular 13 Multiple Image Upload with Preview - Laratutorials.com</h1>
    
<form [formGroup]="myForm" (ngSubmit)="submit()">
           
    <div class="form-group">
        <label for="name">Name</label>
        <input 
            formControlName="name"
            id="name" 
            type="text" 
            class="form-control">
        <div *ngIf="f['name'].touched && f['name'].invalid" class="alert alert-danger">
            <div *ngIf="f['name'].errors && f['name'].errors['required']">Name is required.</div>
 
            <div *ngIf="f['name'].errors && f['name'].errors['minlength']">Name should be 3 character.</div>
        </div>
    </div>
     
    <div class="form-group">
        <label for="file">File</label>
        <input 
            formControlName="file"
            id="file" 
            type="file" 
            class="form-control"
            multiple="" 
            (change)="onFileChange($event)">
        <div *ngIf="f['file'].touched && f['file'].invalid" class="alert alert-danger">
            <div *ngIf="f['file'].errors && f['file'].errors['required']">File is required.</div>
        </div>
    </div>
     
    <img *ngFor='let url of images'  [src]="url" height="150" width="200px" style="margin: 3px;"> <br/>
         
    <button class="btn btn-primary" [disabled]="myForm.invalid" type="submit">Submit</button>
</form>

Step 4 – Update Component ts File

Go to the src/app directory and open app.component.ts. Then add the following code like formGroup and formControl element on component.ts file:

import { Component } from '@angular/core';
import { HttpClient } from '@angular/common/http';
import { FormGroup, FormControl, Validators} from '@angular/forms';
    
@Component({
  selector: 'app-root',
  templateUrl: './app.component.html',
  styleUrls: ['./app.component.css']
})
export class AppComponent {
   images : string[] = [];
  
  /*------------------------------------------
  --------------------------------------------
  Declare Form
  --------------------------------------------
  --------------------------------------------*/
  myForm = new FormGroup({
    name: new FormControl('', [Validators.required, Validators.minLength(3)]),
    file: new FormControl('', [Validators.required]),
    fileSource: new FormControl('', [Validators.required])
  });
    
  /*------------------------------------------
  --------------------------------------------
  Created constructor
  --------------------------------------------
  --------------------------------------------*/
  constructor(private http: HttpClient) { }
    
  /**
   * Write code on Method
   *
   * @return response()
   */
  get f(){
    return this.myForm.controls;
  }
    
  /**
   * Write code on Method
   *
   * @return response()
   */
  onFileChange(event:any) {
    if (event.target.files && event.target.files[0]) {
        var filesAmount = event.target.files.length;
        for (let i = 0; i < filesAmount; i++) {
                var reader = new FileReader();
     
                reader.onload = (event:any) => {
                  console.log(event.target.result);
                   this.images.push(event.target.result); 
   
                   this.myForm.patchValue({
                      fileSource: this.images
                   });
                }
    
                reader.readAsDataURL(event.target.files[i]);
        }
    }
  }
    
  /**
   * Write code on Method
   *
   * @return response()
   */
  submit(){
    console.log(this.myForm.value);
    this.http.post('http://localhost:8001/upload.php', this.myForm.value)
      .subscribe(res => {
        console.log(res);
        alert('Uploaded Successfully.');
      })
  }
}

Step 5 – Create Upload.php File

Create upload.php file and update the following code into it:

<?php
  
header("Access-Control-Allow-Origin: *");
header("Access-Control-Allow-Methods: PUT, GET, POST");
header("Access-Control-Allow-Headers: Origin, X-Requested-With, Content-Type, Accept");
   
$folderPath = "upload/";
$postdata = file_get_contents("php://input");
$request = json_decode($postdata);
   
foreach ($request->fileSource as $key => $value) {
   
    $image_parts = explode(";base64,", $value);
   
    $image_type_aux = explode("image/", $image_parts[0]);
   
    $image_type = $image_type_aux[1];
  
    $image_base64 = base64_decode($image_parts[1]);
  
    $file = $folderPath . uniqid() . '.'.$image_type;
  
    file_put_contents($file, $image_base64);
}

Step 6 – Start Angular App And PHP Server

Run the following commands on terminal to start the angular app and as well as php server:

ng serve

php -S localhost:8001

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