add

.gitignore

+/vendor/

.idea/composerJson.xml

+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ComposerJsonPluginSettings">
+    <unboundedVersionInspectionSettings>
+      <excludedPackages />
+    </unboundedVersionInspectionSettings>
+    <customRepositories />
+    <composerUpdateOptions />
+  </component>
+</project>
\ No newline at end of file

.idea/hello-world-echo.iml

+<?xml version="1.0" encoding="UTF-8"?>
+<module type="WEB_MODULE" version="4">
+  <component name="NewModuleRootManager">
+    <content url="file://$MODULE_DIR$">
+      <sourceFolder url="file://$MODULE_DIR$/src" isTestSource="false" packagePrefix="ZhangWan\" />
+      <excludeFolder url="file://$MODULE_DIR$/vendor/composer" />
+    </content>
+    <orderEntry type="inheritedJdk" />
+    <orderEntry type="sourceFolder" forTests="false" />
+  </component>
+</module>
\ No newline at end of file

.idea/inspectionProfiles/Project_Default.xml

+<component name="InspectionProjectProfileManager">
+  <profile version="1.0">
+    <option name="myName" value="Project Default" />
+    <inspection_tool class="DuplicatedCode" enabled="false" level="WEAK WARNING" enabled_by_default="false" />
+    <inspection_tool class="PhpDocSignatureInspection" enabled="false" level="WEAK WARNING" enabled_by_default="false" />
+    <inspection_tool class="PhpFullyQualifiedNameUsageInspection" enabled="false" level="WARNING" enabled_by_default="false" />
+  </profile>
+</component>
\ No newline at end of file

.idea/misc.xml

+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="JavaScriptSettings">
+    <option name="languageLevel" value="ES6" />
+  </component>
+</project>
\ No newline at end of file

.idea/modules.xml

+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ProjectModuleManager">
+    <modules>
+      <module fileurl="file://$PROJECT_DIR$/.idea/hello-world-echo.iml" filepath="$PROJECT_DIR$/.idea/hello-world-echo.iml" />
+    </modules>
+  </component>
+</project>
\ No newline at end of file

.idea/php.xml

+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="PhpIncludePathManager">
+    <include_path>
+      <path value="$PROJECT_DIR$/vendor/composer" />
+    </include_path>
+  </component>
+  <component name="PhpProjectSharedConfiguration" php_language_level="7.1" />
+</project>
\ No newline at end of file

.idea/vcs.xml

+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="VcsDirectoryMappings">
+    <mapping directory="$PROJECT_DIR$" vcs="Git" />
+  </component>
+</project>
\ No newline at end of file

composer.json

+{
+  "name": "zhangwan/hello-world-echo",
+  "description": "the package to echo hello world.",
+  "license": "MIT",
+  "authors": [
+    {
+      "name": "godjarvis",
+      "email": "2454280556@qq.com"
+    }
+  ],
+  "require": {
+    "php": ">=7.1.0"
+  },
+  "autoload": {
+    "psr-4": {
+      "ZhangWan\\": "src"
+    }
+  }
+}

src/HelloWorldEchoService.php

+<?php
+/**
+ * Created by : PhpStorm
+ * User: godjarvis
+ * Date: 2022/6/2
+ * Time: 14:52
+ */
+
+namespace ZhangWan;
+
+
+class HelloWorldEchoService
+{
+    public static function echo(): string
+    {
+        echo $str = 'hello world!';
+        return $str;
+    }
+}
\ No newline at end of file