带有 %s 和 %d 的 PHP MySQL 查询
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时间:2020-08-25 00:29:24 来源:igfitidea点击:
PHP MySQL query with %s and %d
提问by Delirium tremens
SELECT COUNT(*) AS test FROM %s WHERE id = %d AND tmp_mail <> ''
What are %sand %dfor?
是什么%s和%d为了什么?
回答by Piskvor left the building
Those are format symbols used e.g. by sprintf(). Example:
这些是使用的格式符号,例如sprintf(). 例子:
<?php
$sql_template = "SELECT COUNT(*) AS test FROM %s WHERE id = %d AND tmp_mail <> ''";
$sql_real = sprintf($sql_template, 'sometable', 12345);
echo $sql_real;
?>
Output:
输出:
SELECT COUNT(*) AS test FROM sometable WHERE id = 12345 AND tmp_mail <> ''
回答by Gumbo
That are probably format symbolsfor stringand decimal integer.
那可能是string和decimal integer 的格式符号。

