Add JSON handling for search/replace in custom tables and nested JSON

[ratneshjais]

No description provided.

[gemini-code-assist]

Code Review

This pull request introduces support for searching and replacing strings within JSON-encoded data, including nested structures and escaped URLs. It adds automatic detection of JSON columns and updates the recursive processing logic to handle JSON decoding and encoding. The review feedback identifies a malformed regular expression in the JSON detection logic and suggests a performance optimization to avoid unnecessary json_decode calls by performing a preliminary character check.

[gemini-code-assist]

The regular expression ^[\\[{] appears to be malformed as it opens a character class [ but does not close it with a corresponding ]. This will likely result in a database error or fail to match any rows, preventing the automatic detection of JSON columns. A more reliable and readable approach for detecting strings starting with { or [ is to use an alternation.

						$serial_row = $wpdb->get_row( "SELECT * FROM $table_sql WHERE $col_sql REGEXP '^(\\\\[|{)' LIMIT 1" );

[gemini-code-assist]

Attempting to json_decode() every string in a column detected as JSON can lead to significant performance degradation, especially for large text fields like post_content. Since valid JSON objects and arrays must start with { or [, adding a quick character check before calling json_decode() will avoid unnecessary parsing for the majority of non-JSON strings.

				// Try to decode as a JSON object or array and recurse into the
				// decoded structure. This properly handles URLs stored inside
				// JSON-encoded columns (e.g. Gravity Forms confirmations, block
				// editor font data), including nested JSON where slashes are
				// double-escaped.
				if ( '' !== $data && ( '{' === $data[0] || '[' === $data[0] ) ) {
					$json_decoded = json_decode( $data, true );
					if ( null !== $json_decoded && is_array( $json_decoded ) ) {
						$json_decoded = $this->run_recursively( $json_decoded, false, $recursion_level + 1, $visited_data );
						$json_result  = json_encode( $json_decoded );
						if ( false !== $json_result ) {
							$data = $json_result;
						}
					}
				} elseif ( $this->regex ) {

[swissspidy]

Which issue is this for? Some additional context would be helpful.

[github-actions]

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