WP_Interactivity_API::data_wp_bind_processor( WP_Interactivity_API_Directives_Processor $p, string $mode )

1108	private function data_wp_bind_processor( WP_Interactivity_API_Directives_Processor $p, string $mode ): void {1109		if ( 'enter' === $mode ) {1110			$entries = $this->get_directive_entries( $p, 'bind' );1111			foreach ( $entries as $entry ) {1112				if ( empty( $entry['suffix'] ) || null !== $entry['unique_id'] ) {1113					continue;1114				}1115 1116				// Skip if the suffix is an event handler.1117				if ( str_starts_with( $entry['suffix'], 'on' ) ) {1118					_doing_it_wrong(1119						__METHOD__,1120						sprintf(1121							/* translators: %s: The directive, e.g. data-wp-on--click. */1122							__( 'Binding event handler attributes is not supported. Please use "%s" instead.' ),1123							esc_attr( 'data-wp-on--' . substr( $entry['suffix'], 2 ) )1124						),1125						'6.9.2'1126					);1127					continue;1128				}1129 1130				$result = $this->evaluate( $entry );1131 1132				/*1133				 * An object is resolved to whatever it serializes to. When the reference points to a value stored1134				 * in state or context, that is the value the client receives for it when the store is hydrated.1135				 * A derived state closure is never serialized, so there the client value comes from the derived1136				 * state's client-side implementation instead; the resolution is still applied so that both origins1137				 * behave the same. Round-tripping through the JSON encoder rather than calling1138				 * JsonSerializable::jsonSerialize() directly keeps this resolution identical to the client's,1139				 * including for an object which serializes to another serializable object. When the encoding fails1140				 * the object is left in place, to be reported as a usage error below. Note that it rarely does1141				 * fail: wp_json_encode() retries through _wp_json_sanity_check(), which rebuilds the object from1142				 * its public properties and so ignores jsonSerialize() altogether. An object whose serialized form1143				 * JSON cannot represent therefore resolves to whatever that rebuild encodes to, which is what the1144				 * client is sent for it as well.1145				 *1146				 * A throwing JsonSerializable::jsonSerialize() is caught for the same reason the value is checked1147				 * at all: a binding must not be able to abort the render. An exception escaping here would leave1148				 * `$context_stack` and `$namespace_stack` unrestored for every later `process_directives()` call1149				 * on this instance, so the object is treated as one which failed to encode.1150				 */1151				if ( is_object( $result ) ) {1152					try {1153						$encoded = wp_json_encode( $result );1154					} catch ( Throwable $e ) {1155						$encoded = false;1156					}1157					if ( false !== $encoded ) {1158						$result = json_decode( $encoded );1159					}1160				}1161 1162				/*1163				 * Only a value which can be sent to the client may be stored in an attribute value. Strings and1164				 * booleans are passed in as-is, numbers are formatted, and everything else is rejected as a usage1165				 * error.1166				 *1167				 * An object which does not serialize to a scalar is rejected even when it defines `__toString()`,1168				 * which PHP would otherwise coerce for the string parameters of the escaping functions. Its string1169				 * representation is not what the client evaluates this reference to, whether that is the form1170				 * serialized into the store or the return value of a derived state's client-side implementation,1171				 * so the two could disagree once the directive is evaluated during hydration.1172				 */1173				if ( null !== $result ) {1174					if ( ! is_scalar( $result ) ) {1175						_doing_it_wrong(1176							__METHOD__,1177							sprintf(1178								/* translators: %s: The attribute name. */1179								__( 'Attempted to bind a non-scalar value to the "%s" attribute. Ensure the state/context property or the derived state closure resolves to a string, number, or boolean.' ),1180								esc_html( $entry['suffix'] )1181							),1182							'7.1.0'1183						);1184						$result = null;1185					} elseif ( is_int( $result ) || is_float( $result ) ) {1186						/*1187						 * A number is formatted by the JSON encoder rather than cast to string, so that the
When	Instructions	Calls it makes
`$mode !== "enter"`	5	none
`$mode === "enter"`	12–13	`->get_directive_entries()`
PHP	Compiled	Executed	Branches	Notes
8.6-dev	154	5–13	21
8.5	154	5–13	21
8.4	154	5–13	21	6 fewer instructions than PHP 8.3
8.3	160	5–13	21
8.2	160	5–13	21
8.1	160	5–13	21	3 fewer instructions than PHP 7.4
7.4	163	5–13	21