phpjs
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JavaScript
function preg_split(pattern, subject, limit, flags) {
// http://kevin.vanzonneveld.net
// + original by: Marco Marchiò
// * example 1: preg_split(/[\s,]+/, 'hypertext language, programming');
// * returns 1: ['hypertext', 'language', 'programming']
// * example 2: preg_split('//', 'string', -1, 'PREG_SPLIT_NO_EMPTY');
// * returns 2: ['s', 't', 'r', 'i', 'n', 'g']
// * example 3: var str = 'hypertext language programming';
// * example 3: preg_split('/ /', str, -1, 'PREG_SPLIT_OFFSET_CAPTURE');
// * returns 3: [['hypertext', 0], ['language', 10], ['programming', 19]]
// * example 4: preg_split('/( )/', '1 2 3 4 5 6 7 8', 4, 'PREG_SPLIT_DELIM_CAPTURE');
// * returns 4: ['1', ' ', '2', ' ', '3', ' ', '4 5 6 7 8']
// * example 5: preg_split('/( )/', '1 2 3 4 5 6 7 8', 4, (2 | 4));
// * returns 5: [['1', 0], [' ', 1], ['2', 2], [' ', 3], ['3', 4], [' ', 5], ['4 5 6 7 8', 6]]
limit = limit || 0; flags = flags || ''; // Limit and flags are optional
var result, ret = [], index = 0, i = 0,
noEmpty = false, delim = false, offset = false,
OPTS = {}, optTemp = 0,
regexpBody = /^\/(.*)\/\w*$/.exec(pattern.toString())[1],
regexpFlags = /^\/.*\/(\w*)$/.exec(pattern.toString())[1];
// Non-global regexp causes an infinite loop when executing the while,
// so if it's not global, copy the regexp and add the "g" modifier.
pattern = pattern.global && typeof pattern !== 'string' ? pattern :
new RegExp(regexpBody, regexpFlags + (regexpFlags.indexOf('g') !== -1 ? '' : 'g'));
OPTS = {
'PREG_SPLIT_NO_EMPTY': 1,
'PREG_SPLIT_DELIM_CAPTURE': 2,
'PREG_SPLIT_OFFSET_CAPTURE': 4
};
if (typeof flags !== 'number') { // Allow for a single string or an array of string flags
flags = [].concat(flags);
for (i = 0; i < flags.length; i++) {
// Resolve string input to bitwise e.g. 'PREG_SPLIT_OFFSET_CAPTURE' becomes 4
if (OPTS[flags[i]]) {
optTemp = optTemp | OPTS[flags[i]];
}
}
flags = optTemp;
}
noEmpty = flags & OPTS.PREG_SPLIT_NO_EMPTY;
delim = flags & OPTS.PREG_SPLIT_DELIM_CAPTURE;
offset = flags & OPTS.PREG_SPLIT_OFFSET_CAPTURE;
var _filter = function(str, strindex) {
// If the match is empty and the PREG_SPLIT_NO_EMPTY flag is set don't add it
if (noEmpty && !str.length) {return;}
// If the PREG_SPLIT_OFFSET_CAPTURE flag is set
// transform the match into an array and add the index at position 1
if (offset) {str = [str, strindex];}
ret.push(str);
};
// Special case for empty regexp
if (!regexpBody) {
result = subject.split('');
for (i = 0; i < result.length; i++) {
_filter(result[i], i);
}
return ret;
}
// Exec the pattern and get the result
while (result = pattern.exec(subject)) {
// Stop if the limit is 1
if (limit === 1) {break;}
// Take the correct portion of the string and filter the match
_filter(subject.slice(index, result.index), index);
index = result.index + result[0].length;
// If the PREG_SPLIT_DELIM_CAPTURE flag is set, every capture match must be included in the results array
if (delim) {
// Convert the regexp result into a normal array
var resarr = Array.prototype.slice.call(result);
for (i = 1; i < resarr.length; i++) {
if (result[i] !== undefined) {
_filter(result[i], result.index + result[0].indexOf(result[i]));
}
}
}
limit--;
}
// Filter last match
_filter(subject.slice(index, subject.length), index);
return ret;
}