Warning: Invalid argument supplied for foreach() and Warning: Cannot modify header information - headers already sent
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How to fix "Headers already sent" error in PHP
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Cannot use object of type stdClass as array?
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PHP: Illegal string-offset
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foreach and simplexml
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what is the [count=\i] in \foreach for?
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header("location") causes [500] internal server error?
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Can't modify list elements in a loop
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Using \Alph on \foreach loop argument
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Adding to a \foreach variable in pgfplots
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Foreach loop with multiple arrays
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Warning: Massive error in json_encode()
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Redefining variables in a \foreach loop
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Fatal error: Call to a member function fetch_assoc() on a non-object
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PHP headers already sent
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PHP error: "Cannot pass parameter 2 by reference"
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Why can't I do foreach (var Item in DataTable.Rows)?
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Replacement for drupal_add_http_header()