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Summery Summery
Parses a unified or context diff.
Syntax Syntax
Description Description
First param contains the whole diff and the second can be used to force a specific diff type. If the second parameter is ‘autodetect’, the diff will be examined to find out which type of diff this is.
Parameters Parameters
- $diff
-
(Required) The diff content.
- $mode
-
(Optional) The diff mode of the content in $diff. One of 'context', 'unified', or 'autodetect'.
Default value: 'autodetect'
Return Return
(array) List of all diff operations.
Source Source
File: wp-includes/Text/Diff/Engine/string.php
function diff($diff, $mode = 'autodetect')
{
// Detect line breaks.
$lnbr = "\n";
if (strpos($diff, "\r\n") !== false) {
$lnbr = "\r\n";
} elseif (strpos($diff, "\r") !== false) {
$lnbr = "\r";
}
// Make sure we have a line break at the EOF.
if (substr($diff, -strlen($lnbr)) != $lnbr) {
$diff .= $lnbr;
}
if ($mode != 'autodetect' && $mode != 'context' && $mode != 'unified') {
return PEAR::raiseError('Type of diff is unsupported');
}
if ($mode == 'autodetect') {
$context = strpos($diff, '***');
$unified = strpos($diff, '---');
if ($context === $unified) {
return PEAR::raiseError('Type of diff could not be detected');
} elseif ($context === false || $unified === false) {
$mode = $context !== false ? 'context' : 'unified';
} else {
$mode = $context < $unified ? 'context' : 'unified';
}
}
// Split by new line and remove the diff header, if there is one.
$diff = explode($lnbr, $diff);
if (($mode == 'context' && strpos($diff[0], '***') === 0) ||
($mode == 'unified' && strpos($diff[0], '---') === 0)) {
array_shift($diff);
array_shift($diff);
}
if ($mode == 'context') {
return $this->parseContextDiff($diff);
} else {
return $this->parseUnifiedDiff($diff);
}
}