AlkantarClanX12
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<?php
/**
* TablePress Table Export Class
*
* @package TablePress
* @subpackage Export/Import
* @author Tobias Bäthge
* @since 1.0.0
*/
// Prohibit direct script loading.
defined( 'ABSPATH' ) || die( 'No direct script access allowed!' );
/**
* TablePress Table Export Class
*
* @package TablePress
* @subpackage Export/Import
* @author Tobias Bäthge
* @since 1.0.0
*/
class TablePress_Export {
/**
* File/Data Formats that are available for the export.
*
* @since 1.0.0
* @var array<string, string>
*/
public array $export_formats = array();
/**
* Delimiters for the CSV export.
*
* @since 1.0.0
* @var array<string, string>
*/
public array $csv_delimiters = array();
/**
* Whether ZIP archive support is available in the PHP installation on the server.
*
* @since 1.0.0
*/
public bool $zip_support_available = false;
/**
* Initialize the Export class.
*
* @since 1.0.0
*/
public function __construct() {
// Initiate here, because function call not possible outside a class method.
$this->export_formats = array(
'csv' => __( 'CSV - Character-Separated Values', 'tablepress' ),
'html' => __( 'HTML - Hypertext Markup Language', 'tablepress' ),
'json' => __( 'JSON - JavaScript Object Notation', 'tablepress' ),
);
$this->csv_delimiters = array(
';' => __( '; (semicolon)', 'tablepress' ),
',' => __( ', (comma)', 'tablepress' ),
'tab' => __( '\t (tabulator)', 'tablepress' ),
);
if ( class_exists( 'ZipArchive', false ) ) {
$this->zip_support_available = true;
}
}
/**
* Export a table.
*
* @since 1.0.0
*
* @param array<string, mixed> $table Table to be exported.
* @param string $export_format Format for the export ('csv', 'html', 'json').
* @param string $csv_delimiter Delimiter for CSV export.
* @return string Exported table (only data for CSV and HTML, full tables (including options) for JSON).
*/
public function export_table( array $table, string $export_format, string $csv_delimiter ): string {
switch ( $export_format ) {
case 'csv':
$output = '';
if ( 'tab' === $csv_delimiter ) {
$csv_delimiter = "\t";
}
foreach ( $table['data'] as $row_idx => $row ) {
$csv_row = array();
foreach ( $row as $column_idx => $cell_content ) {
$csv_row[] = $this->csv_wrap_and_escape( $cell_content, $csv_delimiter );
}
$output .= implode( $csv_delimiter, $csv_row );
$output .= "\n";
}
break;
case 'html':
$num_rows = count( $table['data'] );
$last_row_idx = $num_rows - 1;
$thead = '';
$tfoot = '';
$tbody = array();
foreach ( $table['data'] as $row_idx => $row ) {
// Table head rows, but only if there's at least one additional row.
if ( $row_idx < $table['options']['table_head'] && $num_rows > $table['options']['table_head'] ) {
$thead = $this->html_render_row( $row, 'th' );
continue;
}
// Table foot rows, but only if there's at least one additional row.
if ( $row_idx > $last_row_idx - $table['options']['table_foot'] && $num_rows > $table['options']['table_foot'] ) {
$tfoot = $this->html_render_row( $row, 'th' );
continue;
}
// Neither first nor last row (with respective head/foot enabled), so render as body row.
$tbody[] = $this->html_render_row( $row, 'td' );
}
// <thead>, <tfoot>, and <tbody> tags.
if ( ! empty( $thead ) ) {
$thead = "\t<thead>\n{$thead}\t</thead>\n";
}
if ( ! empty( $tfoot ) ) {
$tfoot = "\t<tfoot>\n{$tfoot}\t</tfoot>\n";
}
$tbody = "\t<tbody>\n" . implode( '', $tbody ) . "\t</tbody>\n";
$output = "<table>\n" . $thead . $tfoot . $tbody . "</table>\n";
break;
case 'json':
$output = wp_json_encode( $table, TABLEPRESS_JSON_OPTIONS );
if ( false === $output ) {
$output = '';
}
break;
default:
$output = '';
}
return $output;
}
/**
* Wrap and escape a cell for CSV export.
*
* @since 1.0.0
*
* @param string $cell_content Content of a cell.
* @param string $delimiter CSV delimiter character.
* @return string Wrapped string for CSV export.
*/
protected function csv_wrap_and_escape( string $cell_content, string $delimiter ): string {
// Return early if the cell is empty. No escaping or wrapping is needed then.
if ( '' === $cell_content ) {
return $cell_content;
}
// Escape potentially dangerous functions that could be used for CSV injection attacks in external spreadsheet software.
$active_content_triggers = array( '=', '+', '-', '@' );
if ( in_array( $cell_content[0], $active_content_triggers, true ) ) {
$functions_to_escape = array(
'cmd|',
'rundll32',
'DDE(',
'IMPORTXML(',
'IMPORTFEED(',
'IMPORTHTML(',
'IMPORTRANGE(',
'IMPORTDATA(',
'IMAGE(',
'HYPERLINK(',
'WEBSERVICE(',
);
foreach ( $functions_to_escape as $function ) {
if ( false !== stripos( $cell_content, $function ) ) {
$cell_content = "'" . $cell_content; // Prepend a ' to indicate that the cell format is a text string.
break;
}
}
}
// Escape CSV delimiter for RegExp (e.g. '|').
$delimiter = preg_quote( $delimiter, '#' );
if ( 1 === preg_match( '#' . $delimiter . '|"|\n|\r#i', $cell_content ) || str_starts_with( $cell_content, ' ' ) || str_ends_with( $cell_content, ' ' ) ) {
// Escape single " as double "".
$cell_content = str_replace( '"', '""', $cell_content );
// Wrap string in "".
$cell_content = '"' . $cell_content . '"';
}
return $cell_content;
}
/**
* Generate the HTML of a row.
*
* @since 1.0.0
*
* @param string[] $row Cells of the row to be rendered.
* @param string $tag HTML tag to use for the cells (td or th).
* @return string HTML code for the row.
*/
protected function html_render_row( array $row, string $tag ): string {
$output = "\t\t<tr>\n";
array_walk( $row, array( $this, 'html_wrap_and_escape' ), $tag );
$output .= implode( '', $row );
$output .= "\t\t</tr>\n";
return $output;
}
/**
* Wrap and escape a cell for HTML export.
*
* @since 1.0.0
*
* @param string $cell_content Content of a cell.
* @param int $column_idx Column index, or -1 if omitted. Unused, but defined to be able to use function as callback in array_walk().
* @param string $html_tag HTML tag that shall be used for the cell.
*/
protected function html_wrap_and_escape( string &$cell_content, int $column_idx, string $html_tag ): void {
/*
* Replace any & with & that is not already an encoded entity (from function htmlentities2 in WP 2.8).
* A complete htmlentities2() or htmlspecialchars() would encode <HTML> tags, which we don't want.
*/
$cell_content = (string) preg_replace( '/&(?![A-Za-z]{0,4}\w{2,3};|#[0-9]{2,4};)/', '&', $cell_content );
$cell_content = "\t\t\t<{$html_tag}>{$cell_content}</{$html_tag}>\n";
}
} // class TablePress_Export