PHP: Remove third item in 4 items comma list "1,2,3,4"

This question already has an answer here:

PHP: Delete an element from an array 34 answers

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OK. How about using strpos and instr? Find the second comma and the third one.

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$s = "1,2,3,4";
$array = explode(',', $s); 
unset($array[2]);
$Arr = array_values($array); 
print_r($Arr);

演示：https：//eval.in/85585

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怎么样，通过这个你不依赖于字符串的位置，而是可以通过价值消灭。

$s = "1,2,3,4";
$array = explode(",",$s);
$val = 3 ;
$key = array_search($val,$array);
if($key!==false){
    unset($array[$key]);
}

echo implode(",",$array); // 1,2,4

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