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Confusion between bindValue() and bindParam()?

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I am confuse between these two functions Bindvalue() and BindParam() I read on php.net it does not escape % and _ , so be careful when using LIKE . So i think BindValue() is not used when we are using LIKE query. when we using LIKE query BindParam() is used. Because as i know BindParam can escape these % and _ . BindValue() doesn't gives protection against sql injection. I am not sure about this, is it true? friends tell what i mention in these 3 points is right or wrong. i am beginner in PDO so please explain it clearly .. There should be no difference in how values are escaped or not escaped

Is it possible to use bind_param for ORDER BY? [duplicate]

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问题 This question already has an answer here: Can I parameterize the table name in a prepared statement? 2 answers In my mind I have a query that goes something like this: $sort = isset($sort) ? sanitize($_sort) : 'id'; if ($result = $link->prepare(" SELECT id, price FROM items ORDER BY ? ")) { $result->bind_param("s", $sort); $result->execute(); etc... } When I run this code block without setting the sort variable it runs without an error relating to the use of the ? in the ORDER BY clause and a

Bind multiple parameters into mysqli query

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问题 Right now I need to use the following structure to cope with binding multiple parameters into a mysqli query: if ($words_total == 1) { $statement -> bind_param(\"s\", $words[0]); } else if ($words_total == 2) { $statement -> bind_param(\"ss\", $words[0], $words[1]); } else if ($words_total == 3) { $statement -> bind_param(\"sss\", $words[0], $words[1], $words[2]); } //and so on.... I work out the number of question marks using the code below and insert it into my query: $marks = \"\"; for($i

What is the difference between bindParam and bindValue?

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问题 What is the difference between PDOStatement::bindParam() and PDOStatement::bindValue()? 回答1: The answer is in the documentation for bindParam: Unlike PDOStatement::bindValue(), the variable is bound as a reference and will only be evaluated at the time that PDOStatement::execute() is called. And execute call PDOStatement::bindParam() to bind PHP variables to the parameter markers: bound variables pass their value as input and receive the output value, if any, of their associated parameter