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<?php
/**
* WPConfig trait.
*
* Allows read/write of wp-config.php file.
*
* @since 1.7.0
* @since 2.5.0 Improved functionality and moved to a trait from Page_Cache module.
* @package Hummingbird\Core
*/
namespace Hummingbird\Core\Traits;
use Hummingbird\WP_Hummingbird;
if ( ! defined( 'ABSPATH' ) ) {
exit;
}
/**
* Trait WPConfig
*/
trait WPConfig {
/**
* Config file path.
*
* @var string $wp_config_file
*/
public $wp_config_file = ABSPATH . 'wp-config.php';
/**
* File pointer.
*
* @var null|resource $fp
*/
private $fp = null;
/**
* Add a define to wp-config.php file.
*
* @since 2.5.0
*
* @param string $name Define name.
* @param string $value Define value.
*
* @return bool
*/
public function wpconfig_add( $name, $value ) {
if ( ! $this->can_continue() ) {
return false;
}
$value = $this->prepare_value( $value );
$lines = $this->get_lines();
// Generate the new file data.
$new_file = array();
$added = false;
foreach ( $lines as $line ) {
// Maybe there's already a define?
if ( preg_match( "/define\(\s*'{$name}'/i", $line ) ) {
$added = true;
WP_Hummingbird::get_instance()->core->logger->log( "Added define( {$name}, {$value} ) to wp-config.php file.", $this->get_slug() );
$new_file[] = "define( '{$name}', {$value} ); // Added by Hummingbird";
continue;
}
// If we reach the end and no define - add it.
if ( ! $added && preg_match( "/\/\* That's all, stop editing!.*/i", $line ) ) {
WP_Hummingbird::get_instance()->core->logger->log( "Added define( {$name}, {$value} ) to wp-config.php file.", $this->get_slug() );
$new_file[] = "define( '{$name}', {$value} ); // Added by Hummingbird";
}
$new_file[] = $line;
}
return $this->write( implode( "\n", $new_file ) );
}
/**
* Remove a define from wp-config.php file.
*
* @since 2.5.0
*
* @param string $name Define name.
*
* @return bool
*/
public function wpconfig_remove( $name ) {
if ( ! $this->can_continue() ) {
return false;
}
$lines = $this->get_lines();
// Generate the new file data.
$new_file = array();
foreach ( $lines as $line ) {
if ( preg_match( "/define\(\s*'{$name}'/i", $line ) ) {
WP_Hummingbird::get_instance()->core->logger->log( "Removed define( '{$name}', ... ) from wp-config.php file.", $this->get_slug() );
continue;
}
$new_file[] = $line;
}
return $this->write( implode( "\n", $new_file ) );
}
/**
* Check if we can access the file.
*
* @since 2.5.0
*
* @return bool
*/
private function can_continue() {
// Taken from wp-load.php.
// If config file doesn't exists in root directory, try to locate it in a directory above.
if ( ! file_exists( $this->wp_config_file )
&& ( file_exists( dirname( ABSPATH ) . '/wp-config.php' ) && ! file_exists( dirname( ABSPATH ) . '/wp-settings.php' ) ) )
{
// The config file resides one level above ABSPATH but is not part of another installation.
$this->wp_config_file = dirname( ABSPATH ) . '/wp-config.php';
}
if ( ! file_exists( $this->wp_config_file ) ) {
WP_Hummingbird::get_instance()->core->logger->log( 'Failed to locate wp-config.php file.', $this->get_slug() );
return false;
}
if ( ! $this->fp = fopen( $this->wp_config_file, 'r+' ) ) {
WP_Hummingbird::get_instance()->core->logger->log( 'Failed to open wp-config.php for writing.', $this->get_slug() );
return false;
}
return true;
}
/**
* Try to convert the value to a proper string, so that it is properly written to wp-config.php file.
*
* @since 2.5.0
*
* @param mixed $value Value.
*
* @return string
*/
private function prepare_value( $value ) {
// Make sure to enclose in single quotes if this is a string value.
if ( is_string( $value ) ) {
return "'{$value}'";
}
if ( is_bool( $value ) ) {
return $value ? 'true' : 'false';
}
return $value;
}
/**
* Get lines from file.
*
* @since 2.5.0
*
* @return array
*/
private function get_lines() {
// Attempt to get a lock. If the filesystem supports locking, this will block until the lock is acquired.
flock( $this->fp, LOCK_EX );
$lines = array();
while ( ! feof( $this->fp ) ) {
$lines[] = rtrim( fgets( $this->fp ), "\r\n" );
}
return $lines;
}
/**
* Write to the start of the file, and truncate it to that length.
*
* @since 2.5.0
*
* @param string $data File data.
*
* @return bool
*/
private function write( $data ) {
fseek( $this->fp, 0 );
$bytes = fwrite( $this->fp, $data );
if ( $bytes ) {
ftruncate( $this->fp, ftell( $this->fp ) );
}
fflush( $this->fp );
flock( $this->fp, LOCK_UN );
fclose( $this->fp );
return (bool) $bytes;
}
}
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