no idea what version to which this applies as i’ve never installed or configured gallery2, but here’s the process by which i just now debugged one particular gallery2 install…
gallery2/config.php
line 30 - @ini_set(’display_errors’, 1);
line 134 - $gallery->setDebug(’buffered’);
1st error:
Unknown column ‘g2_Item.g_renderer’
grep -r ‘renderer’ *
modules/core/classes/GalleryStorage/schema.tpl:
CREATE TABLE DB_TABLE_PREFIXItem(
…
DB_COLUMN_PREFIXownerId int(11) NOT NULL,
DB_COLUMN_PREFIXrenderer varchar(128),
ALTER TABLE g2_Item ADD g_renderer VARCHAR(128) NULL AFTER […]

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if, after painfully specifying character set and collation for your database, all your tables, and all columns within them, you’re still experiencing discrepencies between what your database is storing (eg. strings appear correct from within phpMyAdmin) versus what your website is displaying from database query results (question marks instead of your fancy quotes), try this:
mysql_query(”SET […]

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when you’re “rolling your own” session management by using header(”Set-Cookie:… and you’re mixing temporary cookies with ones that have an expires= attribute, you may notice erratic behavior unless you set the temporary parameters first.
for example,
header(”Set-Cookie: permanent=important; expires=Sun, 17-Jan-2037 23:59:59 GMT”);
header(”Set-Cookie: temporary=trivial”);
may not work as expected, whereas if you switch the two around, you’re good to […]

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