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✏️ Editing: php-compatibility.func.php

<?php
/**
 * LiteSpeed PHP compatibility functions for lower PHP version
 *
 * @since      1.1.3
 * @package    LiteSpeed_Cache
 * @subpackage LiteSpeed_Cache/lib
 * @author     LiteSpeed Technologies <info@litespeedtech.com>
 */

defined( 'WPINC' ) || exit;

/**
 * http_build_url() compatibility
 */
if ( ! function_exists( 'http_build_url' ) ) {
	if ( ! defined( 'HTTP_URL_REPLACE' ) ) {
		define( 'HTTP_URL_REPLACE', 1 );              // Replace every part of the first URL when there's one of the second URL
	}
	if ( ! defined( 'HTTP_URL_JOIN_PATH' ) ) {
		define( 'HTTP_URL_JOIN_PATH', 2 );            // Join relative paths
	}
	if ( ! defined( 'HTTP_URL_JOIN_QUERY' ) ) {
		define( 'HTTP_URL_JOIN_QUERY', 4 );           // Join query strings
	}
	if ( ! defined( 'HTTP_URL_STRIP_USER' ) ) {
		define( 'HTTP_URL_STRIP_USER', 8 );           // Strip any user authentication information
	}
	if ( ! defined( 'HTTP_URL_STRIP_PASS' ) ) {
		define( 'HTTP_URL_STRIP_PASS', 16 );          // Strip any password authentication information
	}
	if ( ! defined( 'HTTP_URL_STRIP_AUTH' ) ) {
		define( 'HTTP_URL_STRIP_AUTH', 32 );          // Strip any authentication information
	}
	if ( ! defined( 'HTTP_URL_STRIP_PORT' ) ) {
		define( 'HTTP_URL_STRIP_PORT', 64 );          // Strip explicit port numbers
	}
	if ( ! defined( 'HTTP_URL_STRIP_PATH' ) ) {
		define( 'HTTP_URL_STRIP_PATH', 128 );         // Strip complete path
	}
	if ( ! defined( 'HTTP_URL_STRIP_QUERY' ) ) {
		define( 'HTTP_URL_STRIP_QUERY', 256 );        // Strip query string
	}
	if ( ! defined( 'HTTP_URL_STRIP_FRAGMENT' ) ) {
		define( 'HTTP_URL_STRIP_FRAGMENT', 512 );     // Strip any fragments (#identifier)
	}
	if ( ! defined( 'HTTP_URL_STRIP_ALL' ) ) {
		define( 'HTTP_URL_STRIP_ALL', 1024 );         // Strip anything but scheme and host
	}

// Build an URL
	// The parts of the second URL will be merged into the first according to the flags argument.
	//
	// @param   mixed           (Part(s) of) an URL in form of a string or associative array like parse_url() returns
	// @param   mixed           Same as the first argument
	// @param   int             A bitmask of binary or'ed HTTP_URL constants (Optional)HTTP_URL_REPLACE is the default
	// @param   array           If set, it will be filled with the parts of the composed url like parse_url() would return
	function http_build_url( $url, $parts = array(), $flags = HTTP_URL_REPLACE, &$new_url = false ) {
		$keys = array( 'user', 'pass', 'port', 'path', 'query', 'fragment' );

// HTTP_URL_STRIP_ALL becomes all the HTTP_URL_STRIP_Xs
		if ( $flags & HTTP_URL_STRIP_ALL ) {
			$flags |= HTTP_URL_STRIP_USER;
			$flags |= HTTP_URL_STRIP_PASS;
			$flags |= HTTP_URL_STRIP_PORT;
			$flags |= HTTP_URL_STRIP_PATH;
			$flags |= HTTP_URL_STRIP_QUERY;
			$flags |= HTTP_URL_STRIP_FRAGMENT;
		}
		// HTTP_URL_STRIP_AUTH becomes HTTP_URL_STRIP_USER and HTTP_URL_STRIP_PASS
		elseif ( $flags & HTTP_URL_STRIP_AUTH ) {
			$flags |= HTTP_URL_STRIP_USER;
			$flags |= HTTP_URL_STRIP_PASS;
		}

// Parse the original URL
		// - Suggestion by Sayed Ahad Abbas
		// In case you send a parse_url array as input
		$parse_url = ! is_array( $url ) ? parse_url( $url ) : $url;

// Scheme and Host are always replaced
		if ( isset( $parts['scheme'] ) ) {
			$parse_url['scheme'] = $parts['scheme'];
		}
		if ( isset( $parts['host'] ) ) {
			$parse_url['host'] = $parts['host'];
		}

// (If applicable) Replace the original URL with it's new parts
		if ( $flags & HTTP_URL_REPLACE ) {
			foreach ( $keys as $key ) {
				if ( isset( $parts[ $key ] ) ) {
					$parse_url[ $key ] = $parts[ $key ];
				}
			}
		} else {
			// Join the original URL path with the new path
			if ( isset( $parts['path'] ) && ( $flags & HTTP_URL_JOIN_PATH ) ) {
				if ( isset( $parse_url['path'] ) ) {
					$parse_url['path'] = rtrim( str_replace( basename( $parse_url['path'] ), '', $parse_url['path'] ), '/' ) . '/' . ltrim( $parts['path'], '/' );
				} else {
					$parse_url['path'] = $parts['path'];
				}
			}

// Join the original query string with the new query string
			if ( isset( $parts['query'] ) && ( $flags & HTTP_URL_JOIN_QUERY ) ) {
				if ( isset( $parse_url['query'] ) ) {
					$parse_url['query'] .= '&' . $parts['query'];
				} else {
					$parse_url['query'] = $parts['query'];
				}
			}
		}

// Strips all the applicable sections of the URL
		// Note: Scheme and Host are never stripped
		foreach ( $keys as $key ) {
			if ( $flags & (int) constant( 'HTTP_URL_STRIP_' . strtoupper( $key ) ) ) {
				unset( $parse_url[ $key ] );
			}
		}

$new_url = $parse_url;

return ( isset( $parse_url['scheme'] ) ? $parse_url['scheme'] . '://' : '' )
			. ( isset( $parse_url['user'] ) ? $parse_url['user'] . ( isset( $parse_url['pass'] ) ? ':' . $parse_url['pass'] : '' ) . '@' : '' )
			. ( isset( $parse_url['host'] ) ? $parse_url['host'] : '' )
			. ( isset( $parse_url['port'] ) ? ':' . $parse_url['port'] : '' )
			. ( isset( $parse_url['path'] ) ? $parse_url['path'] : '' )
			. ( isset( $parse_url['query'] ) ? '?' . $parse_url['query'] : '' )
			. ( isset( $parse_url['fragment'] ) ? '#' . $parse_url['fragment'] : '' );
	}
}

if ( ! function_exists( 'array_key_first' ) ) {
	function array_key_first( array $arr ) {
		foreach ( $arr as $k => $unused ) {
			return $k;
		}
		return null;
	}
}

if ( ! function_exists( 'array_column' ) ) {
	function array_column( $array, $column_name ) {
		return array_map(
			function ( $element ) use ( $column_name ) {
				return $element[ $column_name ];
			},
			$array
		);
	}
}

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