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Fix bug #61062 no explanation given about parameter $convmap in mb_decode_numericentity(). Example code is taken from my blog. http://blog.ohgaki.net/javascript-string-escape

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git-svn-id: https://svn.php.net/repository/phpdoc/en/trunk@338291 c90b9560-bf6c-de11-be94-00142212c4b1
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Yasuo Ohgaki 2015-12-18 09:46:58 +00:00
parent 042696fa64
commit 5dce0583ce
1 changed files with 69 additions and 0 deletions
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69
reference/mbstring/functions/mb-decode-numericentity.xml
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@ -75,6 +75,75 @@ $convmap = array (
// Add offsetN to value and take bit-wise 'AND' with maskN,
// then convert value to numeric string reference.
?>
]]>
</programlisting>
</example>
</para>
<para>
<example>
<title><parameter>convmap</parameter> example escapes JavaScript string</title>
<programlisting role="php">
<![CDATA[
<?php
function escape_javascript_string($str) {
$map = [
1,1,1,1,1,1,1,1,1,1,
1,1,1,1,1,1,1,1,1,1,
1,1,1,1,1,1,1,1,1,1,
1,1,1,1,1,1,1,1,1,1,
1,1,1,1,1,1,1,1,0,0, // 49
0,0,0,0,0,0,0,0,1,1,
1,1,1,1,1,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,
0,1,1,1,1,1,1,0,0,0, // 99
0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,
0,0,0,1,1,1,1,1,1,1,
1,1,1,1,1,1,1,1,1,1,
1,1,1,1,1,1,1,1,1,1, // 149
1,1,1,1,1,1,1,1,1,1,
1,1,1,1,1,1,1,1,1,1,
1,1,1,1,1,1,1,1,1,1,
1,1,1,1,1,1,1,1,1,1,
1,1,1,1,1,1,1,1,1,1, // 199
1,1,1,1,1,1,1,1,1,1,
1,1,1,1,1,1,1,1,1,1,
1,1,1,1,1,1,1,1,1,1,
1,1,1,1,1,1,1,1,1,1,
1,1,1,1,1,1,1,1,1,1, // 249
1,1,1,1,1,1,1, // 255
];
// Char encoding is UTF-8
$mblen = mb_strlen($str, 'UTF-8');
$utf32 = bin2hex(mb_convert_encoding($str, 'UTF-32', 'UTF-8'));
for ($i=0, $encoded=''; $i < $mblen; $i++) {
$u = substr($utf32, $i*8, 8);
$v = base_convert($u, 16, 10);
if ($v < 256 && $map[$v]) {
$encoded .= '\\x'.substr($u, 6,2);
} else if ($v == 2028) {
$encoded .= '\\u2028';
} else if ($v == 2029) {
$encoded .= '\\u2029';
} else {
$encoded .= mb_convert_encoding(hex2bin($u), 'UTF-8', 'UTF-32');
}
}
return $encoded;
}
// Test data
$convmap = [ 0x0, 0xffff, 0, 0xffff ];
$msg = '';
for ($i=0; $i < 1000; $i++) {
// chr() cannot generate correct UTF-8 data larger value than 128, use mb_decode_numericentity().
$msg .= mb_decode_numericentity('&#'.$i.';', $convmap, 'UTF-8');
}
// var_dump($msg);
var_dump(escape_javascript_string($msg));
]]>
</programlisting>
</example>