php相加float,PHP：string和float之间的总和问题

谁践踏了优雅 2022-11-13 04:08 261阅读 0赞

考虑这个数组

array(6) \{

\["id"\]=>

int(346058)

\["amount"\]=>

string(5) "60.00"

\["id\_shop\_where\_transaction\_is\_done"\]=>

int(300)

\["id\_shop\_where\_money\_come\_from"\]=>

NULL

\["negative\_sum"\]=>

float(-60)

\["negative"\]=>

array(11) \{

\[0\]=>

array(5) \{

\["id"\]=>

int(346060)

\["amount"\]=>

string(5) "-2.20"

\["id\_shop\_where\_transaction\_is\_done"\]=>

int(300)

\["id\_shop\_where\_money\_come\_from"\]=>

NULL

\["id\_referring\_transaction"\]=>

int(346058)

\[1\]=>

array(5) \{

\["id"\]=>

int(348152)

\["amount"\]=>

string(5) "-7.50"

\["id\_shop\_where\_transaction\_is\_done"\]=>

int(300)

\["id\_shop\_where\_money\_come\_from"\]=>

NULL

\["id\_referring\_transaction"\]=>

int(346058)

\[2\]=>

array(5) \{

\["id"\]=>

int(350163)

\["amount"\]=>

string(5) "-7.70"

\["id\_shop\_where\_transaction\_is\_done"\]=>

int(300)

\["id\_shop\_where\_money\_come\_from"\]=>

NULL

\["id\_referring\_transaction"\]=>

int(346058)

\[3\]=>

array(5) \{

\["id"\]=>

int(351996)

\["amount"\]=>

string(5) "-5.20"

\["id\_shop\_where\_transaction\_is\_done"\]=>

int(300)

\["id\_shop\_where\_money\_come\_from"\]=>

NULL

\["id\_referring\_transaction"\]=>

int(346058)

\[4\]=>

array(5) \{

\["id"\]=>

int(353919)

\["amount"\]=>

string(5) "-5.00"

\["id\_shop\_where\_transaction\_is\_done"\]=>

int(300)

\["id\_shop\_where\_money\_come\_from"\]=>

NULL

\["id\_referring\_transaction"\]=>

int(346058)

\[5\]=>

array(5) \{

\["id"\]=>

int(354768)

\["amount"\]=>

string(5) "-2.50"

\["id\_shop\_where\_transaction\_is\_done"\]=>

int(300)

\["id\_shop\_where\_money\_come\_from"\]=>

NULL

\["id\_referring\_transaction"\]=>

int(346058)

\[6\]=>

array(5) \{

\["id"\]=>

int(356650)

\["amount"\]=>

string(5) "-5.00"

\["id\_shop\_where\_transaction\_is\_done"\]=>

int(300)

\["id\_shop\_where\_money\_come\_from"\]=>

NULL

\["id\_referring\_transaction"\]=>

int(346058)

\[7\]=>

array(5) \{

\["id"\]=>

int(361683)

\["amount"\]=>

string(5) "-5.00"

\["id\_shop\_where\_transaction\_is\_done"\]=>

int(300)

\["id\_shop\_where\_money\_come\_from"\]=>

NULL

\["id\_referring\_transaction"\]=>

int(346058)

\[8\]=>

array(5) \{

\["id"\]=>

int(361836)

\["amount"\]=>

string(5) "-7.50"

\["id\_shop\_where\_transaction\_is\_done"\]=>

int(300)

\["id\_shop\_where\_money\_come\_from"\]=>

NULL

\["id\_referring\_transaction"\]=>

int(346058)

\[9\]=>

array(5) \{

\["id"\]=>

int(364145)

\["amount"\]=>

string(5) "-7.90"

\["id\_shop\_where\_transaction\_is\_done"\]=>

int(300)

\["id\_shop\_where\_money\_come\_from"\]=>

NULL

\["id\_referring\_transaction"\]=>

int(346058)

\[10\]=>

array(5) \{

\["id"\]=>

int(364426)

\["amount"\]=>

string(5) "-4.50"

\["id\_shop\_where\_transaction\_is\_done"\]=>

int(300)

\["id\_shop\_where\_money\_come\_from"\]=>

NULL

\["id\_referring\_transaction"\]=>

int(346058)

\}一点解释：

$array\[0\]\['negative\_sum'\]是$array\[0\]\['negative'\]\[$i\]\['amount'\]的总和

(如果你这样做，总数是-60。)

现在，我需要检查$ array \[0\] \['amount'\]是否为negative\_sum，所以有些东西。

$positive\_amount = $transaction\[$i\]\['amount'\];

$negative\_amount = $transaction\[$i\]\['negative\_sum'\];

if ($positive\_amount>abs($negative\_amount)) \{

$difference = -$positive\_amount-$negative\_amount;

var\_dump($difference);

$data\['difference'\] = $difference;

\}首先，特定情况下的if代码不会被执行，因为60不会大于abs(-60)。但它被执行。

第二个，var\_dump($差异)输出是

float(-7,105427357601E-15)不明白为什么。谢谢。

Per @OptimusCrime答案。我修改了一下代码。

$positive\_amount = $transaction\[$i\]\['amount'\];

$negative\_amount = $transaction\[$i\]\['negative\_sum'\];

var\_dump(number\_format($positive\_amount, 90));

var\_dump(number\_format($negative\_amount, 90));

if ($positive\_amount>abs($negative\_amount)) \{

$difference = -$positive\_amount-$negative\_amount;

var\_dump($difference);

$data\['difference'\] = $difference;

\}该var\_dump输出两个：

string(93) "60.000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000"

string(94) "-60.000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000"

php相加float,PHP：string和float之间的总和问题

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