As far as I understand docker hub have only those versions of php .

sudo docker search php

NAME                       DESCRIPTION                                     STARS               OFFICIAL            AUTOMATED
php                        While designed for web development, the PHP …   5114                [OK]                
phpmyadmin/phpmyadmin      A web interface for MySQL and MariaDB.          967                                     [OK]
adminer                    Database management in a single PHP file.       362                 [OK]                
php-zendserver             Zend Server - the integrated PHP application…   180                 [OK]                
webdevops/php-nginx        Nginx with PHP-FPM                              150                                     [OK]
webdevops/php-apache-dev   PHP with Apache for Development (eg. with xd…   116                                     [OK]
webdevops/php-apache       Apache with PHP-FPM (based on webdevops/php)    100                                     [OK]
bitnami/php-fpm            Bitnami PHP-FPM Docker Image                    86                                      [OK]
phpunit/phpunit            PHPUnit is a programmer-oriented testing fra…   75                                      [OK]
nazarpc/phpmyadmin         phpMyAdmin as Docker container, based on off…   60                                      [OK]
circleci/php               CircleCI images for PHP                         28                                      
thecodingmachine/php       General-purpose ultra-configurable PHP images   28                                      [OK]
phpdockerio/php72-fpm      PHP 7.2 FPM base container for PHPDocker.io.    19                                      [OK]
bitnami/phpmyadmin         Bitnami Docker Image for phpMyAdmin             18                                      [OK]
phpdockerio/php7-fpm       PHP 7 FPM base container for PHPDocker.io.      14                                      [OK]
phpdockerio/php56-fpm      PHP 5.6 FPM base container for PHPDocker.io     13                                      [OK]
graze/php-alpine           Smallish php7 alpine image with some common …   13                                      [OK]
appsvc/php                 Azure App Service php dockerfiles               12                                      [OK]
phpdockerio/php73-fpm      PHP 7.3 FPM base container for PHPDocker.io.    11                                      
phpdockerio/php71-fpm      PHP 7.1 FPM base container for PHPDocker.io.    7                                       [OK]
phpdockerio/php72-cli      PHP 7.2 CLI base container for PHPDocker.io.    4                                       [OK]
phpdockerio/php7-cli       PHP 7 CLI base container image for PHPDocker…   1                                       [OK]
phpdockerio/php56-cli      PHP 5.6 CLI base container for PHPDocker.io …   1                                       [OK]
phpdockerio/php71-cli      PHP 7.1 CLI base container for PHPDocker.io.    1                                       [OK]
isotopab/php               Docker PHP                                      0                                       [OK]

So you could either use 1 of that.

OR, if you want this specific version

There is the specific image version on docker hub.

You can use docker pull

docker pull php:7.3.15-apache

And push it to your private registry with docker push

docker push

More about it.

• https://stackoverflow.com/a/28349540/11977760
• https://www.docker.com/blog/how-to-use-your-own-registry/

And use your own registry instead of docker hub.

To deploy an image from a private repository, you must create an image pull secret with your image registry credentials. You have more informations under your Image Name.

I hope this answer your question. Let me know if you have any more questions.

@jt97 Thanks for directing me to the correct direction.I am adding more details with screenshots in this answer for newbies like me on how to search in dockerhub.

1. Go to docker hub and search php
2. Select the first result. Select 'Tags' tab and enter the version name in the 'Filter Tags'. I have given 7.3.15-apache. No need to mention php again here.

I don't know why docker search can't find this image. May be as @jt97 mentioned, it display only major versions.