$a = '36,0.00,0.00,100|37,0.00,0.00,100|38,0.00,0.00,100|39,0.00,0.00,100';
$b='38';
$c='85';
用PHP怎么做一替换。。。
就是说 当$a中 包含$b中的字数后。 把38，0.00，0.00，100 中的100替换成$c中的数字。
如果$b=‘37’
那么就把37，0.00，0.00，100 中的100替换成$c中的数字。
谢谢各位了
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php5.3+ 通过
$a = '36,0.00,0.00,10036,0.00,0.00,100
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37,0.00,0.00,100
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38,0.00,0.00,100
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39,0.00,0.00,100';
$b='38';
$c='85';
echo preg_replace_callback("/(^
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\
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$b,0.00,0.00,)100/", function($m) use ($c){ return $m[1].$c;}, $a);
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37,0.00,0.00,100
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38,0.00,0.00,85
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39,0.00,0.00,100