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PHP:pg_escape_identifier()的用法_PostgreSQL函数
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(PHP 5 >= 5.4.4)
pg_escape_identifier — Escape a identifier for insertion into a text field
说明 string pg_escape_identifier ([ resource $connection ], string $data )pg_escape_identifier() escapes a identifier (e.g. table, field names) for quering the database. It returns an escaped identifier string for PostgreSQL server. pg_escape_identifier() adds double quotes before and after data. Users should not add double quotes. Use of this function is recommended for identifier parameters in query. For SQL literals (i.e. parameters except bytea), pg_escape_literal() or pg_escape_string() muse be used. For bytea type fields, pg_escape_bytea() must be used instead.
Note:
This function has internal escape code and can also be used with PostgreSQL 8.4 or less.
参数
connection
PostgreSQL database connection resource. When connection is not present, the default connection is used. The default connection is the last connection made by pg_connect() or pg_pconnect().
dataA string containing text to be escaped.
返回值A string containing the escaped data.
范例
Example #1 pg_escape_identifier() example
<?php//Connecttothedatabase$dbconn=pg_connect('dbname=foo');//Escapethetablenamedata$escaped=pg_escape_identifier($table_name);//Selectrowsfrom$table_namepg_query("SELECT*FROM{$escaped};");?> 参见pg_escape_literal() - Escape a literal for insertion into a text field pg_escape_bytea() - 转义 bytea 类型的二进制数据 pg_escape_string() - 转义 text/char 类型的字符串
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