mysql_field_flags

Get the flags associated with the specified field in a result (PHP 4, PHP 5, PECL mysql:1.0)
string mysql_field_flags ( resource result, int field_offset )

Example 1436. A mysql_field_flags() example

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<?php

$result = mysql_query("SELECT id,email FROM people WHERE id = '42'");

if (!$result) {

    echo 'Could not run query: ' . mysql_error();

    exit;

}
$flags = mysql_field_flags($result, 0);


echo $flags;
print_r(explode(' ', $flags));
?>

The above example will output something similar to:

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not_null primary_key auto_increment

Array

(

    [0] => not_null

    [1] => primary_key

    [2] => auto_increment

)

Related Examples ( Source code ) » mysql_field_flags

Examples ( Source code ) » List Database, Table, and Field

Examples ( Source code ) » Get table column flag

Code Examples / Notes » mysql_field_flags

bomas

well, to make a complete backup of your database, i suggest this code: //open database here $tab_status = mysql_query("SHOW TABLE STATUS"); while($all = mysql_fetch_assoc($tab_status)): $tbl_stat[$all[Name]] = $all[Auto_increment]; endwhile; unset($backup); $tables = mysql_list_tables('cofadmin'); while($tabs = mysql_fetch_row($tables)): $backup .= "--\n--Tabel structuur voor `$tabs[0]`\n--\n\nDROP IF EXISTS TABLE `$tabs[0]`\nCREATE TABLE IF NOT EXISTS `$tabs[0]` ( "; $res = mysql_query("SHOW CREATE TABLE $tabs[0]"); while($all = mysql_fetch_assoc($res)): $str = str_replace("CREATE TABLE `$tabs[0]` (", "", $all['Create Table']); $str = str_replace(",", ", ", $str); $str2 = str_replace("`) ) TYPE=MyISAM ", "`)\n ) TYPE=MyISAM ", $str); $backup .= $str2." AUTO_INCREMENT=".$tbl_stat[$tabs[0]].";\n\n"; endwhile; $backup .= "--\n--Gegevens worden uitgevoerd voor tabel `$tabs[0]`\n--\n\n"; $data = mysql_query("SELECT * FROM $tabs[0]"); while($dt = mysql_fetch_row($data)): $backup .= "INSERT INTO `$tabs[0]` VALUES('$dt[0]'"; for($i=1; $i<sizeof($dt); $i++): $backup .= ", '$dt[$i]'"; endfor; $backup .= ");\n"; endwhile; $backup .= "\n-- --------------------------------------------------------\n\n"; endwhile; echo $backup; this displayes your data the same way as phpmyadmin does. hope it helps some of you guys Greetz

cufarley

Using the "DESC TableName" command may also do the trick and is a bit shorter.

buttrose

This function is essential for writing a generic table editor (ie one that just takes the name of the table and works out what fields it has, types, sizes etc.). Unfortunately, I am using psotgreSQL not mySql. Postgres has field_type and field_size functions but not as far as I can tell an equivalent of the mysql_field_flags() function. Without it, there is no way I can do generic ADDs and INSERTs. Anyone know a workaround to get this information (eg is the field a primary key? Can it be NULL? Is it auto_increment?) in Postgres? Cheers Rob Buttrose

jurgen

The previous problem to get the default values of a column: Use the following query and parse the 'Default' column: "SHOW COLUMNS FROM TableName" or for a single entry: "SHOW COLUMNS FROM TableName LIKE 'column'" It will give you also values for Type, Null, Key and Extra (check with mysql program first, so you see what you get ;-)

justin dot flavin

Sometimes, when writing a generic function or class, you want your script to be able to determine what the primary key of a table is. /* usual MySQL stuff */ $query="DESC UsersTable"; $results=mysql_query($query); while ($row=mysql_fetch_array($results)) { if ($row[Type]="PRI") { print "I found the primary key! "; $UserKey=$row[Field]; print $row[Field]; /* drop out , as we've found the key */ exit; } } ..... later on we might have something like < some sort of loop through records > print "<a href='View_User_record.php?userkey=$UserKey'> Users Name </a>"; <end loop> What's also interesting is the useful data you can get from a DESC query. The following prints out the array values grabbed by mysql_fetch_array on a DESC query - VERY useful stuff!!! /* usual MySQL stuff */ $query="DESC UsersTable"; $results=mysql_query($query); while ($row=mysql_fetch_array($results)) { print "<pre>"; print_r ($row); print "</pre>"; }

amir

returns primary keys of a table using 'show keys' although it is possible to use desc, show keys offers possible enhancements such a getting sequence in index along with it function getPrimaryKeyOf($table, $link) { $pk = Array(); $sql = 'SHOW KEYS FROM `'.$table.'`'; $res = mysql_query($table, $link) or die(mysql_error()); while ($row = mysql_fetch_assoc($res)) { if ($row['Key_name']=='PRIMARY') array_push($pk, $row['Column_name']); } return $pk; }

pike-php

ok, sorry for the code bloat :) but this is how I get the full power of mysql's DESCRIBE table statement, in an associative array, including defaults, enum values, float radix et all. it assumes mysql returns the type as "type[(arg[,arg..])] [ add]" like "float(20,6) unsigned" "enum('yes','no')" etc <? function getFields($tablename) { $fields = array(); $fullmatch = "/^([^(]+)($[^)]+$)?(\s(.+))?$/"; $charlistmatch = "/,?'([^']*)'/"; $numlistmatch = "/,?(\d+)/"; $fieldsquery .= "DESCRIBE $tablename"; $result_fieldsquery = mysql_query($fieldsquery) or die(mysql_error()); while ($row_fieldsquery = mysql_fetch_assoc($result_fieldsquery)) { $name = $row_fieldsquery['Field']; $fields[$name] = array(); $fields[$name]["type"] = ""; $fields[$name]["args"] = array(); $fields[$name]["add"] = ""; $fields[$name]["null"] = $row_fieldsquery['Null']; $fields[$name]["key"] = $row_fieldsquery['Key']; $fields[$name]["default"] = $row_fieldsquery['Default']; $fields[$name]["extra"] = $row_fieldsquery['Extra']; $fulltype = $row_fieldsquery['Type']; $typeregs = array(); if (preg_match($fullmatch, $fulltype, $typeregs)) { $fields[$name]["type"] = $typeregs[1]; if ($typeregs[4]) $fields[$name]["add"] = $typeregs[4]; $fullargs = $typeregs[2]; $argsreg = array(); if (preg_match_all($charlistmatch, $fullargs, $argsreg)) { $fields[$name]["args"] = $argsreg[1]; } else { $argsreg = array(); if (preg_match_all($numlistmatch, $fullargs, $argsreg)) { $fields[$name]["args"] = $argsreg[1]; } else die("cant parse type args: $fullargs"); } } else die("cant parse type: $fulltype"); } return $fields; } ?>

jakemsr

I didn't find anything to get the valid values for ENUM or SET column types, so I came up with the following function mysql_enum_values($table, $field) { $sql = "SHOW COLUMNS FROM $table LIKE '$field'"; $sql_res = mysql_query($sql) or die("Could not query:\n$sql"); $row = mysql_fetch_assoc($sql_res); mysql_free_result($sql_res); return(explode("','", preg_replace("/.*$'(.*)'$/", "\\1", $row["Type"]))); }

simone dot t

Another examples : #################################### function field_keys($host, $user, $password, $database, $field ) { $db_link = mysql_connect($host, $user, $password) or die ("error connect"); mysql_select_db($database,$db_link); $query="DESC $field"; $results=mysql_query($query); $i=0; while ($row=mysql_fetch_array($results)) { if ($row[Key]=="PRI") { $array_keys[$i]=$row[Field]; } $i++; } return $array_keys; } #################################### //Example of Main... $tmp = field_keys("localhost", "myuser", "mypassword", "mydb", "field_name" ); // ...loop through array... foreach ( $tmp as $array_tmp){ print " "; print $array_tmp; print " "; }

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