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请教PHP中的PHP_EOL为什么没有效果

WBOY
WBOYOriginal
2016-06-13 11:35:151256browse

请问PHP中的PHP_EOL为什么没有效果?
如下程序:

<br /><?php<br />header('Content-Type:text/html;charset=utf-8');<br /><br />function customError($errno, $errstr, $errfile, $errline) {<br />	echo '<b>错误代码:</b>['.$errno.'] '.$errstr.PHP_EOL;<br />	echo '错误所在的代码行:'.$errline.' 文件'.$errfile.PHP_EOL;<br />	echo 'PHP版本:'.PHP_VERSION.'('.PHP_OS.')'.PHP_EOL;<br />	die();<br />}<br />set_error_handler('customError', E_ALL|E_STRICT);<br />$a = array('o' => 2, 4, 6, 8);<br />echo $a[o];<br /><br />


输出:
错误代码:[8] Use of undefined constant o - assumed 'o' 错误所在的代码行:12 文件/usr/local/apache/htdocs/mytest/test2.php PHP版本:5.4.19(Linux) 

中间没有任何换行,为什么呢??

我的环境是centos

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