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wp-content/plugins/wp-smushit/core/class-server-utils.php

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+<?php
+
+namespace Smush\Core;
+
+class Server_Utils {
+	/**
+	 * @var string
+	 */
+	private $mysql_version;
+
+	public function get_server_type() {
+		if ( empty( $_SERVER['SERVER_SOFTWARE'] ) ) {
+			return '';
+		}
+
+		$server_software = wp_unslash( $_SERVER['SERVER_SOFTWARE'] );
+		if ( ! is_array( $server_software ) ) {
+			$server_software = array( $server_software );
+		}
+
+		$server_software = array_map( 'strtolower', $server_software );
+		$is_nginx        = $this->array_has_needle( $server_software, 'nginx' );
+		if ( $is_nginx ) {
+			return 'nginx';
+		}
+
+		$is_apache = $this->array_has_needle( $server_software, 'apache' );
+		if ( $is_apache ) {
+			return 'apache';
+		}
+
+		return '';
+	}
+
+	public function get_memory_limit() {
+		if ( function_exists( 'ini_get' ) ) {
+			$memory_limit = ini_get( 'memory_limit' );
+		} else {
+			// Sensible default.
+			$memory_limit = '128M';
+		}
+
+		if ( ! $memory_limit || - 1 === $memory_limit ) {
+			// Unlimited, set to 32GB.
+			$memory_limit = '32000M';
+		}
+
+		return intval( $memory_limit ) * 1024 * 1024;
+	}
+
+	public function get_memory_usage() {
+		return memory_get_usage( true );
+	}
+
+	private function array_has_needle( $array, $needle ) {
+		foreach ( $array as $item ) {
+			if ( strpos( $item, $needle ) !== false ) {
+				return true;
+			}
+		}
+
+		return false;
+	}
+
+	public function get_mysql_version() {
+		if ( ! $this->mysql_version ) {
+			global $wpdb;
+			/**
+			 * MariaDB version prefix 5.5.5- is not stripped when using $wpdb->db_version() to get the DB version:
+			 * https://github.com/php/php-src/issues/7972
+			 */
+			$this->mysql_version = $wpdb->get_var( 'SELECT VERSION()' );
+		}
+		return $this->mysql_version;
+	}
+
+	public function get_max_execution_time() {
+		return (int) ini_get( 'max_execution_time' );
+	}
+
+	public function get_user_agent() {
+		return ! empty( $_SERVER['HTTP_USER_AGENT'] ) ? wp_unslash( $_SERVER['HTTP_USER_AGENT'] ) : '';
+	}
+}