PHP How do I make an image to be the default icon if I don’t have an image selected?

Question

When a person selects an image they will send the selected one, but if they do not select a pattern. How can I do this?

I was making a code for the upload more as I can add this functionality?

$up = new Upload("file");
    if(!is_dir($path)):
            mkdir($path, 0755, true);
    endif;
    $up->setDir( $path )->setExtension( array( 'jpeg','jpg','png', 'gif' ) )->setSize( 2 );
    @$up->upload();

<?php

class Upload 
{    
    private $file = array();    
    public $dir;
    public $extension = array(); 
    public $size;
    public $name = array();

    public function __construct( $file )
    {
        $this->file = $_FILES[ $file ];        
    }

    public function upload()
    {
        $this->checkExtension()->size()->rename();

        if( is_array( $this->file[ "name" ] ) && !empty( $this->file[ "name" ] ) )
        {   
            foreach( $this->file[ "error" ] as $key => $error )
            {
                if( $error == UPLOAD_ERR_OK || !empty( $this->file[ "name" ][ $key ] ) )
                {
                    move_uploaded_file( $this->file[ "tmp_name" ][ $key ], $this->getDir() . $this->file[ "name" ][ $key ] );

                    $this->name[] = $this->file[ "name" ][ $key ];
                }
            }
        }
        elseif( !empty( $this->file[ "name" ] ) )
        {            
            move_uploaded_file( $this->file[ "tmp_name" ], $this->getDir() . $this->file[ "name" ] );
            $this->name[] = $this->file[ "name" ];
        }

        return $this->name;
    }

    public function checkExtension()
    {
        if( is_array( $this->extension ) )
        {
            $extensions = implode( "|", $this->extension );

            if( is_array( $this->file[ "name" ] ) )
            {
                foreach( $this->file[ "name" ] as $key => $val )
                {
                    if( !preg_match( "/.+\.({$extensions})/", $val ) )
                    {
                        $this->file[ "name" ][ $key ] = "";
                    }
                }
            }
            else
            {
                if( !preg_match( "/.+\.({$extensions})/", $this->file[ "name" ] ) )
                {
                    unset( $this->file[ "name" ] );
                }
            }
        }

        return $this;
    }

    public function size()
    {
        $size = $this->convertMbToBt();

        if( is_array( $this->file[ "size" ] ) )
        {
            foreach( $this->file[ "size" ] as $key => $sizes )
            {
                if( $sizes > $size )
                {
                    $this->file[ "name" ][ $key ] = "";
                    $this->file[ "size" ][ $key ] = "";
                }
            }
        }
        else
        {
            if( $this->file[ "size" ] > $size )
            {
                unset( $this->file[ "size" ] );
            }
        }

        return $this;
    }

    private function convertMbToBt()
    {
        $size = $this->getSize() * ( 1024 * 1024 );
        return $size;
    }

    protected function rename()
    {
        if( is_array( $this->file[ "name" ] ) )
        {
            foreach( $this->file[ "name" ] as $key => $val )
            {
                if( !empty( $this->file[ "name" ][ $key ] ) )
                {
                    $exts = preg_split( "[\.]", $this->file[ "name" ][ $key ] );
                    $n = count( $exts ) - 1;            
                    $exts = $exts[ $n ];

                    $this->file[ "name" ] = time() . uniqid() . md5($this->file['name']) . "." . $exts;
                }
                else
                {
                    $this->file[ "name" ][ $key ] = "";
                }
            }
        }
        else
        {
            $exts = preg_split( "[\.]", $this->file[ "name" ] );
            $n = count( $exts ) - 1;            
            $exts = $exts[ $n ];
            $this->file[ "name" ] = time() . uniqid() . md5($this->file['name']) . "." . $exts;
        }

        return $this;
    }

    public function getDir()
    {
        return $this->dir;
    }

    public function setDir( $dir )
    {
        $this->dir = $dir;
        return $this;
    }

    public function getExtension()
    {
        return $this->extension;
    }

    public function setExtension( $extension )
    {
        $this->extension = $extension;
        return $this;
    }

    public function getSize()
    {
        return $this->size;
    }

    public function setSize( $size ) 
    {
        $this->size = $size;
        return $this;
    }

    public function setName( $nomeFim ) 
    {
        $this->size = $size;
        return $this;
    }

}

?>

Answer 1

I think you could do a simple check before calling the upload class, something like:

if (isset($_FILES['arquivo']))
{
  "Executa ação de upload"
}
else
{ 
    "utiliza imagem padrão" caminho/imagem.jpg
}

Answer 2

I need that when he, at this stage of user registration, NOT set an image, enter a pattern, some indication? Thanks

Answer 3

You can do as follows. Let’s use as example user registration.

With each new user created, you can associate an image default.jpg already located in your project.

To manage you create a database structure to relate the table of images to that of the user. The image table will have the image name and image path in the project.

When the user does the upload from his photo, save the image in the project and change(UPDATE) in the database the path and the name of the image referring to the user id, thus

UPDATE 
  `imagem` SET `nome`='perfil.jpg' AND caminho='caminho/salvo/no_projeto/imagem'
WHERE `id_usuario`= 3;

Referring to the PHP file upload process

if (isset($_FILES) || isset($_POST['id'])) {
    throw new Exception('Erro ao carregar arquivo');
}

$file = $_FILES;
$user_id = $_POST['id'];

$config = [
    'type_file_allowed' => ['jpeg', 'png', 'jpg'],
    'size_allowed' => 1024 * 1024 * 5, // 5Mb
    'folder' => __DIR__ . 'tmp/', //caminho que irá salvar o arquivo,
    'format_name' => date('now'),
    'file_error_message' => [
        0 => 'Não houve erro e o upload foi bem sucedido.',
        1 => 'O arquivo enviado excede o limite definido.',
        2 => 'O arquivo excede o limite definido em MAX_FILE_SIZE no formulário HTML.',
        3 => 'O upload do arquivo foi feito parcialmente.',
        4 => 'Nenhum arquivo foi anexado',
        6 => 'Pasta temporária estar ausente.',
        7 => 'Falha ao escrever o arquivo em disco.',
        8 => 'Uma extensão do PHP interrompeu o upload do arquivo.'
    ]
];

//Pega extensão do arquivo
$extension = pathinfo($file['name'], PATHINFO_EXTENSION);
if (!in_array($extension, $config['type_file_allowed'])) {
    throw new Exception('Extesão '. $extension .' do arquivo
    não permitida');
}

if($_FILES['size'] > $config['size_allowed']){
    throw new Exception('O arquivo enviado é muito grande, 
    envie arquivos de até 5Mb');
}

$file_name = $config['format_name'] . '.' . $extension;
$path = $config['folder'];

if (move_uploaded_file($_FILES['tmp_name'], $path . $file_name)) {
    $sql = printf("UPDATE `imagem` SET `nome`='%s' AND caminho='%s'
          WHERE `id_usuario`= '%s' ", $file_name, $path, $user_id);
    //$conn é conexão mysqli do banco
    if ($conn->query($sql) === TRUE) {
        echo "Foto do perfil atualizado com sucesso";
    } else {
        echo "Error: " . $sql . "<br>" . $conn->error;
    }
    $conn->close();
}