I have added a custom field to the post Editor to save a temperature as number value. If i put for example "15,2" or "15.2" in this field and save the post, its get saved as "152".
How can i fix it?
Form Field:
<label for="temp_min">Temp Min.:</label><br />
<input class="widefat" type="text" name="temp_min" id="temp_min" value="<?php echo esc_attr( get_post_meta( $object->ID, '_temp_min', true ) ); ?>" size="30" />
save class:
/* Get the posted data and sanitize it for use as an HTML class. */
$new_meta_value = ( isset( $_POST[$fields[$i]] ) ? sanitize_html_class( $_POST[$fields[$i]] ) : '' );
/* Get the meta key. */
$meta_key = $meta_keys[$i];
/* Get the meta value of the custom field key. */
$meta_value = get_post_meta( $post_id, $meta_key, true );
/* If a new meta value was added and there was no previous value, add it. */
if ( $new_meta_value && '' == $meta_value )
add_post_meta( $post_id, $meta_key, $new_meta_value, true );
/* If the new meta value does not match the old value, update it. */
elseif ( $new_meta_value && $new_meta_value != $meta_value )
update_post_meta( $post_id, $meta_key, $new_meta_value );
/* If there is no new meta value but an old value exists, delete it. */
elseif ( '' == $new_meta_value && $meta_value )
delete_post_meta( $post_id, $meta_key, $meta_value );
}
sanitize_html_class remove . or , so 19,5 or 19.5 will result to 195.
Strips the string down to A-Z,a-z,0-9,_,-.
WP codex : https://codex.wordpress.org/Function_Reference/sanitize_html_class
Just use sanitize_text_field or (float) $_POST[$fields[$i]]:
/* Get the posted data and sanitize it for use as an HTML class. */
$new_meta_value = ( isset( $_POST[$fields[$i]] ) ? sanitize_text_field( $_POST[$fields[$i]] ) : '' );