How to dynamically truncate the part of the string "1|10,2|11,3|12" between the | and, number, including |

How to dynamically truncate the part of the string "1|10,2|11,3|12" between | and, the number, including |?
How to use PHP, dynamically truncate the string "1|10,2|11,3|12" in the section between the | and, number, including |?
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Str_replace (",", "", Str_replace ("
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"," ", $val))
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$s = "1
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10,2
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11,3
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12 ";
echo preg_replace ('/\
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[^,]+,/', ', ', $s);

The
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12
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$content = ' 1
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10,2
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11,3
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12 ';
echo preg_replace (Array ('/\
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[^,]+,/','/\
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[^,]+$/'), Array (', ', '), $content);

The
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$s = "1
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10,2
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11,3
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12 ";
echo preg_replace ('/\
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[^,]+/', ', $s);

The

But this does not match: cut it off.
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And, the part between the number

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