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headers_sent
Examples
headers_sent
PHP 4, PHP 5, PHP 7, PHP 8
headers_sent - Checks if or where headers have been sent
Manual
Code Examples
Example #1 Examples using headers_sent
<?php // If no headers are sent, send one if (!headers_sent()) { header('Location: http://www.example.com/'); exit; } // An example using the optional file and line parameters // Note that $filename and $linenum are passed in for later use. // Do not assign them values beforehand. if (!headers_sent($filename, $linenum)) { header('Location: http://www.example.com/'); exit; // You would most likely trigger an error here. } else { echo "Headers already sent in $filename on line $linenum\n" . "Cannot redirect, for now please click this <a " . "href=\"http://www.example.com\">link</a> instead\n"; exit; }
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2
<?php
// If no headers are sent, send one
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XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
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5.4.35
5.4.34
5.4.33
5.4.32
5.4.31
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5.4.28
5.4.27
5.4.26
5.4.25
5.4.24
5.4.23
5.4.22
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5.4.20
5.4.19
5.4.18
5.4.17
5.4.16
5.4.15
5.4.14
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5.4.11
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5.4.9
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5.3.29
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5.3.17
5.3.16
5.3.15
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5.3.13
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Function headers_sent:
Manual
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