pg_field_type()

(PHP 4 >= 4.2.0, PHP 5, PHP 7)

返回相应字段的类型名称

说明

pg_field_type(resource $result,int $field_number): string

pg_field_type()以字符串返回 PostgreSQL$result资源中指定$field_number字段的类型。字段编号从 0 开始。

参考pg_field_name()页面中的例子。

Note:

本函数以前的名字为pg_fieldtype()。

参见pg_field_prtlen()和pg_field_name()。

Here is an updated list of nearly every PostgreSQL data type, and PHP's internal C-type equivalent, updated for PostgreSQL 9.2. The first array maps PHP's internal data type to PostgreSQL's equivalents. The second maps PostgreSQL's data-types to PHP's equivalents.
<?php
$php_to_pg = array(
  'bit' => array('bit'),
  'bool' => array('boolean'),
  'box' => array('box'),
  'bpchar' => array('character','char'),
  'bytea' => array('bytea'),
  'cidr' => array('cidr'),
  'circle' => array('circle'),
  'date' => array('date'),
  'daterange' => array('daterange'),
  'float4' => array('real'),
  'float8' => array('double precision'),
  'inet' => array('inet'),
  'int2' => array('smallint', 'smallserial'),
  'int4' => array('integer', 'serial'),
  'int4range' => array('int4range'),
  'int8' => array('bigint', 'bigserial'),
  'int8range' => array('int8range'),
  'interval' => array('interval'),
  'json' => array('json'),
  'lseg' => array('lseg'),
  'macaddr' => array('macaddr'),
  'money' => array('money'),
  'numeric' => array('decimal', 'numeric'),
  'numrange' => array('numrange'),
  'path' => array('path'),
  'point' => array('point'),
  'polygon' => array('polygon'),
  'text' => array('text'),
  'time' => array('time', 'time without time zone'),
  'timestamp' => array('timestamp', 'timestamp without time zone'),
  'timestamptz' => array('timestamp with time zone'),
  'timetz' => array('time with time zone'),
  'tsquery' => array('tsquery'),
  'tsrange' => array('tsrange'),
  'tsvector' => array('tsvector'),
  'uuid' => array('uuid'),
  'varbit' => array('bit varying'),
  'varchar' => array('character varying', 'varchar'),
  'xml' => array('xml'),
);
$pg_to_php = array(
  'bit' => 'bit',
  'boolean' => 'bool',
  'box' => 'box',
  'character' => 'bpchar',
  'char' => 'bpchar',
  'bytea' => 'bytea',
  'cidr' => 'cidr',
  'circle' => 'circle',
  'date' => 'date',
  'daterange' => 'daterange',
  'real' => 'float4',
  'double precision' => 'float8',
  'inet' => 'inet',
  'smallint' => 'int2',
  'smallserial' => 'int2',
  'integer' => 'int4',
  'serial' => 'int4',
  'int4range' => 'int4range',
  'bigint' => 'int8',
  'bigserial' => 'int8',
  'int8range' => 'int8range',
  'interval' => 'interval',
  'json' => 'json',
  'lseg' => 'lseg',
  'macaddr' => 'macaddr',
  'money' => 'money',
  'decimal' => 'numeric',
  'numeric' => 'numeric',
  'numrange' => 'numrange',
  'path' => 'path',
  'point' => 'point',
  'polygon' => 'polygon',
  'text' => 'text',
  'time' => 'time',
  'time without time zone' => 'time',
  'timestamp' => 'timestamp',
  'timestamp without time zone' => 'timestamp',
  'timestamp with time zone' => 'timestamptz',
  'time with time zone' => 'timetz',
  'tsquery' => 'tsquery',
  'tsrange' => 'tsrange',
  'tstzrange' => 'tstzrange',
  'tsvector' => 'tsvector',
  'uuid' => 'uuid',
  'bit varying' => 'varbit',
  'character varying' => 'varchar',
  'varchar' => 'varchar',
  'xml' => 'xml'
);
?>

Also be aware that postgreSQL array fields will prefix the type name with an underscore (e.g. "_int4" or "_text"), while composite a.k.a. row-type fields will return type "record".

Because complete documentation is always helpful, here are all the PostgreSQL general purpose types as they are listed in the 8.1 documentation, and each corresponding string returned by pg_field_type().
bigint => int8
bigserial => int8
bit => bit
bit varying => varbit
boolean => bool
box => box
bytea => bytea
character varying => varchar
character => bpchar
cidr => cidr
circle => circle
date => date
double precision => float8
inet => inet
integer => int4
interval => interval
line => line
lseg => lseg
macaddr => macaddr
money => money
numeric => numeric
path => path
point => point
polygon => polygon
real => float4
smallint => int2
serial => int4
text => text
time => time
time with time zone => timetz
timestamp => timestamp
timestamp with time zone => timestamptz
And for the record... (note the 7.4 client lib)
# postmaster --version
postmaster (PostgreSQL) 8.0.4
# ldd libphp4.so
...
libpq.so.3 => /usr/lib/libpq.so.3 (0xb7ac8000)
...

The types returned are:
 bool
 int2 (smallint)
 int4
 int8 (bigint)
 numeric
 float4 (real / float)
 float8 (double)
 timestamp
 date
 time
 varchar
 bpchar (fixed leng string, 'blank padded char')
 inet (ip address)
 money
There are some other more esoteric types, e.g. 'circle', but these are the most common.