Three Methods to Implement Page Redirection in PHP
This article explains three PHP techniques for page redirection—using the header() function, outputting a JavaScript location.href script, and inserting a META refresh tag—each with code examples and explanations of how they work and when to use them.
Page redirection is needed when moving pages or adjusting a website to avoid losing traffic; it redirects requests to a new location.
Method 1: Header redirect
<?php
$url = "http://php.cn";
if (isset($url)) {
header("Location:$url");
} else {
echo "没有跳转的地址！";
}
?>The script defines $url, checks its existence, and uses header() to send an HTTP Location header; otherwise it outputs a message.
Method 2: JavaScript redirect
<?php
$url = "http://php.cn";
if (isset($url)) {
echo "<SCRIPT language='JavaScript'>location.href='$url'</SCRIPT>";
} else {
echo "没有跳转的地址！";
}
?>This method echoes a script tag that sets location.href to the target URL after confirming the URL exists.
Method 3: HTML meta refresh
<?php
$url = "http://php.cn";
if (!isset($url)) {
exit("没有跳转的地址！");
}
?>
<HTML>
<head>
<meta HTTP-EQUIV="REFRESH" CONTENT="3; URL='<?php echo $url; ?>' ">
</head>
<body>
</body>
</HTML>The script checks $url and then uses a <meta http-equiv="refresh"> tag to refresh the page after 3 seconds to the new URL.
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