php - Query to retrieve data where a variable is stored in the column name -


i have database looks this.

width | 10 | 20 | 30 | 40 ----------------------------   10  | $2 | $3 | $4 | $5   20  | $3 | $4 | $5 | $6   30  | $4 | $5 | $6 | $7   40  | $5 | $6 | $7 | $8

the top row column names. how pull money value out if given 2 numerical values?

or easiest way reorganise data new columns?

edit:

the numbers in column name heights , numbers in width column widths.

if plug in numbers 10 height , 20 width, i'd want $3 result.

thank you!

try :

// assert $height column exists before query $sql = "select {$height}         table         width = :b_width";

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