php for loop奇怪問題

ilovemk

$a1 = 1;
$m1 = 2;
$a2 = 3;
$m2 = 4;

$ea1 = $a2 - $a1;
$ea2 = $m2 - $m1;

echo "ea1 = ($ea1) ea2 = ($ea2)";係而到佢係會出到ea1 = (2) ea2 = (2)

$abc1 = $ea1;
$abc2 = $ea2;
echo "abc1 = ($abc1) abc2 = ($abc2)<br />";但係而到就abc1 = () abc2 = ()

for ($q = 0; $q < $abc1 ; $q++) {

點解ABC就出唔到個值但EA就出到，如果我唔要ABC直接將EA係FOR LOOP到行都係出唔到
求高手指教

tunster

照你上面睇係無問題

你條 code 真係咁寫? 定你改佐啲 value 放上嚟? 如果放原 source code 睇下好啲

ilovemk

其實差唔多，因為我簡化到咁都行唔到，所以我諗係咪PHP有而個限制
FOR LOOP 唔比用參數
所以想問下你地

tunster

其實差唔多，因為我簡化到咁都行唔到，所以我諗係咪PHP有而個限制
FOR LOOP 唔比用參數
所以想問下你地 ...
ilovemk 發表於 2015-5-20 12:16

你覺得差唔多同實際條 code 點寫係有分別, 串錯一個字已經唔同世界

你有心問真係 copy and paste 條 code 上嚟睇啦

ilovemk

$a1 = 1;
$m1 = 2;
$a2 = 3;
$m2 = 6;

$ea1 = $a2 - $a1;
$ea2 = $m2 - $m1;

echo "ea1 = ($ea1) ea2 = ($ea2)<br />";

$abc1 = $ea1;
$abc2 = $ea2;
echo "abc1 = ($abc1) abc2 = ($abc2)<br />";

for ($i = 0; $i < 3; $i++){
        echo "ver1.2($i)<br />";
for ($q = 0; $q < 3; $q++){
if ($q = 1) {
                echo "q = 0 <br />";
}else if ($q < 3){
                echo "q = 1 <br />";
}else{
                echo "q = 4 <br />";
}
}
}

ea1 = (2) ea2 = (4)
abc1 = (2) abc2 = (4)
ver1.2(0)
q = 0
q = 0
q = 0
q = 0
q = 0
q = 0
q = 0
q = 0
q = 0
q = 0
q = 0
q = 0
q = 0
q = 0
q = 0
q = 0
q = 0
q = 0
q = 0
q = 0
q = 0
q = 0
q = 0
q = 0
點解不停係咁LOOP唔識停??
我暫時都係咁試，我諗住成功先開始寫

ilovemk

由而到開始就係PHP PRINT出黎個結果
ea1 = (2) ea2 = (4)
abc1 = (2) abc2 = (4)
ver1.2(0)
q = 0
q = 0
q = 0

tunster

你個問題出喺哩行

---------> if ($q = 1) {

你哩個係 assignment, 唔係 compare

你應該用 if($q==1)

ilovemk

係WOO，唔該師兄

ilovemk

試左真係這個問題，多謝你

carlkyo

你個問題出喺哩行

---------> if ($q = 1) {

你哩個係 assignment, 唔係 compare

你應該用 if($q==1) ...
tunster 發表於 2015-5-20 13:13

好眼利