So, there are 2 options if you want to create/read memo fields: 1. Use a library for java/c++/c# to build a bridge between php and dbf file. I've used dbf2java. Althougth it's not near complete as my other option, it's a good start. Adding a new field means that a.dbf file must be edited but in this case there is no.dbf to edit. Theoretically QGIS could keep the new schema in memory and create a new.dbf to suit the schema once shapefile is saved. This package can create and manipulate databases in dbase format. It can perform several types of actions to manipulate database dBASE III format. Currently it can: Define a table adding fields of given types, Read a table from DBF file, Filter values of the retrieved table records, Insert new records, Update existing records, Perform transactional updates, Build a table from another table. PHP ShapeFile PHP library to read any ESRI Shapefile and its associated DBF into a PHP Array, WKT or GeoJSON Contents • • • • • • • • • • Get it GitHub View project on or download the latest. Composer composer require gasparesganga/php-shapefile Features • Supports all kinds of shapefiles, including Z and M ones • Provides WKT/EWKT and GeoJSON output • Implements the interface •, and compliant • Sequential read or random access the specific shapefile records • Completely standalone library • Very fast and lightweight • PHP 7 compatible Basic Usage. // This is will look for 'myshape.shp', 'myshape.shx', 'myshape.dbf' and 'myshape.prj' files $ShapeFile = new ShapeFile ( 'myshape' ); // This as well $ShapeFile = new ShapeFile ( 'myshape.shp' ); // And this too $ShapeFile = new ShapeFile ( array ( 'shp' => 'myshape.shp', 'shx' => 'myshape.shx', 'dbf' => 'myshape.dbf', 'prj' => 'myshape.prj' )); The Array version is useful in case of arbitrarily named files ( ie. Temporary files). ![]() How To Create Dbf FileNote that the.prj file is absolutely optional. $flags You can pass optional flags, combined with a bitwise Or operator| or simply adding them. Array ( [ xmin ] => float [ ymin ] => float [ xmax ] => float [ ymax ] => float [ zmin ] => float // Present only for Z shapefiles [ zmax ] => float // Present only for Z shapefiles [ mmin ] => float / false // Present only for M and Z shapefiles [ mmax ] => float / false // Present only for M and Z shapefiles ) “No data” values set for M coordinates in the shapefiles are returned as boolean false. Eventual FLAG_SUPPRESS_Z and FLAG_SUPPRESS_M flags set with the will effectively condition the output. Array ( [ shp ] => array () or string [ dbf ] => array () ) $geometry_format A bitmask to specify the format for returned geometries ( shp part of the returned Array). The available formats are: ShapeFile::GEOMETRY_ARRAY: A structured Array (Default) ShapeFile::GEOMETRY_WKT: Well Known Text string ShapeFile::GEOMETRY_GEOJSON_GEOMETRY: GeoJSON string including only the geometry object ShapeFile::GEOMETRY_GEOJSON_FEATURE: GeoJSON string including the whole feature object You can combine them using a bitwise Or operator| or simply adding them. Geometry Output Geometries read with method can be returned as a structured Array or a string containing their or representation. Open Dbf FilesMulti MULTI*, 3dz * Z, 3dm * M and 4d * ZM geometries are recognized as such. Note that eventual FLAG_SUPPRESS_Z and FLAG_SUPPRESS_M flags set with the will effectively condition the output. In the output Array “no data” values set for M coordinates in the shapefiles are returned as boolean false. GEOMETRY_ARRAY / Combined bitmask. Code Type Description ----------------------------------------------------------------------------------------------------------------------------------------- 11 FILE_EXISTS File not found. Check if the file exists and is readable 12 FILE_OPEN Unable to read file 21 SHAPE_TYPE_NOT_SUPPORTED Shape Type not supported 22 WRONG_RECORD_TYPE Wrong Record's Shape Type 31 POLYGON_AREA_TOO_SMALL Polygon Area too small, can't determine vertex orientation 32 POLYGON_NOT_VALID Polygon not valid or Polygon Area too small. Please check the geometries before reading the Shapefile 41 DBF_FILE_NOT_VALID DBF file doesn't seem to be a valid dBase III or dBase IV format 42 DBF_MISMATCHED_FILE Mismatched DBF file. Number of records not corresponding to the SHP file 43 DBF_EOF_REACHED End of DBF file reached. Number of records not corresponding to the SHP file 91 RECORD_INDEX_NOT_VALID Record index not valid. Check the total number of records in the SHP file Extending the Library The main ShapeFile class can be easily extended thanks to the protected method init().
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