xdiff 函数

xdiff_file_bdiff — Make binary diff of two files
xdiff_file_bdiff_size — Read a size of file created by applying a binary diff
xdiff_file_bpatch — Patch a file with a binary diff
xdiff_file_diff — Make unified diff of two files
xdiff_file_diff_binary — 别名 xdiff_file_bdiff
xdiff_file_merge3 — Merge 3 files into one
xdiff_file_patch — Patch a file with an unified diff
xdiff_file_patch_binary — 别名 xdiff_file_bpatch
xdiff_file_rabdiff — Make binary diff of two files using the Rabin's polynomial fingerprinting algorithm
xdiff_string_bdiff — Make binary diff of two strings
xdiff_string_bdiff_size — Read a size of file created by applying a binary diff
xdiff_string_bpatch — Patch a string with a binary diff
xdiff_string_diff — Make unified diff of two strings
xdiff_string_diff_binary — 别名 xdiff_string_bdiff
xdiff_string_merge3 — Merge 3 strings into one
xdiff_string_patch — Patch a string with an unified diff
xdiff_string_patch_binary — 别名 xdiff_string_bpatch
xdiff_string_rabdiff — Make binary diff of two strings using the Rabin's polynomial fingerprinting algorithm

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amir.laher ¶

19 years ago

the xdiff functions require your initial string to end with a \n character. 

When you use xdiff_string_diff, the initial string must either be zero-length or end with \n
eg. $patch= xdiff_string_diff($string,$string2);

if not, the patch will return an empty string.
xdiff_string_patch($string,$patch);

This will not normally affect xdiff_file_diff, but it's annoying nevertheless. To prevent this unexpected effect, I append a \n to the string before applying the initial diff, as follows.
if (!ereg("\n$",$string)) $string.="\n";

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官方地址：https://www.php.net/manual/en/ref.xdiff.php

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xdiff 函数

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