Can you post the javascript generated by the PHP (ie, view the page in a
browser an copy-paste the source)?
Going with what you posted, though, I would guess that you are passing a
string of dash-separated dates to callDate, which would make each callDates*
i* (incidentally, why not just use the newDate array for this?) a single
date. Assuming then, that you want your date range for the tooltip to be
newDate[i] - newDate[i+1], try replacing your data.addRow lines with this
(for my own sanity, I am using arrays instead of your method, but this is
easily enogh adapted to your method:
var rows = [];
for (i = 0; i < 7; i++) {
rows[i] = [
{v: callDates[i], f: callDates[i] + " - " + callDates[i+1]},
parseInt(callCounts[i]),
parseInt(callCountsPre[i])
];
}
data.addRows(rows);
You will have to pass one more date in your chartDate list (for the end
range of the 7th date). Note that I haven't tested this, it may mess with
the axis as well as the tooltips.
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