Help me, I'm new to ionic and I'm making an app to get information in my php system, I'd like to know how I could do this

Ionic Framework ionic-v3
1

my provider

import { Injectable } from '@angular/core';
import { Http } from '@angular/http';
import 'rxjs/add/operator/map';

/*
  Generated class for the BuscarProvider provider.

  See https://angular.io/guide/dependency-injection for more info on providers
  and Angular DI.
*/
@Injectable()
export class BuscarProvider {

  constructor(public http: Http) {
    console.log('Hello BuscarProvider Provider');
  }
  getLatesBuscar() {
    return this.http.get("http://localhost/projetoagenda/AppSearch.php");
  }
}

page to display the search

<ion-header>
  <ion-navbar>
    <button ion-button menuToggle>
      <ion-icon name="menu"></ion-icon>
    </button>
    <ion-title>
      Agenda
    </ion-title>
  </ion-navbar>
</ion-header>
<ion-content padding id="page10">

  <form>

  <ion-list>
    
      <ion-item>
        <ion-input type="text" placeholder="Digite seu CPF"></ion-input>
      </ion-item>    
    </ion-list>
    
    <div>
      <button ion-button type="submit">Pesquisar</button>
    </div>

  </form>
</ion-content>

JSON

<?php
include("conexao.php");

if(isset($_POST['pesquisar'])){
$nome_pesquisado = $_POST['pesquisar'];
if($_POST['pesquisar'] == ''){
	echo "Você digitou nada no campo de pesquisa.";
}else{

$select = $pdo->query("SELECT * FROM agenda WHERE nome LIKE '%$nome_pesquisado%' OR cpf LIKE '%$nome_pesquisado%'"); 
$rowCount = $select->rowCount();
if($rowCount == 0){
	echo json_encode(array('erro' => 'Nenhum usuario cadastrado com esse CPF. Ligue para agendar sua consulta (11)2204-2118'));
}else{
	$dadosBusca = $select->fetch(PDO::FETCH_OBJ);

	echo json_encode(array('sucess' => $dadosBusca));
	
}
} 
}
	?>