字符串替换数组 PHP 中的所有项目
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String replace all items in array PHP
提问by AJFMEDIA
I would like to do a string replacement in all items in an array. What I have is:
我想在数组中的所有项目中进行字符串替换。我所拥有的是：
$row['c1'] = str_replace("&", "&", $row['c1']);
$row['c2'] = str_replace("&", "&", $row['c2']);
$row['c3'] = str_replace("&", "&", $row['c3']);
$row['c4'] = str_replace("&", "&", $row['c4']);
$row['c5'] = str_replace("&", "&", $row['c5']);
$row['c6'] = str_replace("&", "&", $row['c6']);
$row['c7'] = str_replace("&", "&", $row['c7']);
$row['c8'] = str_replace("&", "&", $row['c8']);
$row['c9'] = str_replace("&", "&", $row['c9']);
$row['c10'] = str_replace("&", "&", $row['c10']);
How can I achieve this with less code? I thought a foreach statement would work, e.g.:
如何用更少的代码实现这一目标？我认为 foreach 语句会起作用，例如：
$columns = array($row['c1'], $row['c2'], $row['c3'], $row['c4'], $row['c5'], $row['c6'], $row['c7'], $row['c8'], $row['c9'], $row['c10']);
foreach ( $columns as $value){
$value = str_replace("&", "&", $value);
}
But it doesn't work.
但它不起作用。
回答by netcoder
Just do:
做就是了：
$row = str_replace("&", "&", $row);
Note:Your foreach doesn't work because you need a reference, or use the key:
注意：您的 foreach 不起作用，因为您需要引用或使用密钥：
foreach ( $columns as &$value) { // reference
$value = str_replace("&", "&", $value);
}
unset($value); // break the reference with the last element
Or:
或者：
foreach ($columns as $key => $value){
$columns[$key] = str_replace("&", "&", $value);
}
Although it is not necessary here because str_replaceaccepts and returns arrays.
虽然这里没有必要，因为str_replace接受并返回数组。
回答by Ish
You should call it by reference, otherwise foreachcreates a duplicate copy of $value
您应该通过引用调用它，否则foreach会创建一个重复的副本$value
foreach ( $columns as &$value)
foreach ( $columns as &$value)
回答by mr.baby123
Another solution to is to use PHP array_walklike this:
另一个解决方案是array_walk像这样使用 PHP ：
function custom_replace( &$item, $key ) {
$item = str_replace('22', '75', $item);
}
// Init dummy array.
$columns = array('Cabbage22', 'Frid22ay', 'Internet', 'Place22', '22Salary', '22Stretch', 'Whale22Inn');
// Print BEFORE.
echo 'Before: ';
print_r($columns);
// Make the replacements.
array_walk($columns, 'custom_replace');
// Print AFTER.
echo 'After:';
print_r($columns);
Output:
输出：
Before: Array
(
[0] => Cabbage22
[1] => Frid22ay
[2] => Internet
[3] => Place22
[4] => 22Salary
[5] => 22Stretch
[6] => Whale22Inn
)
After: Array
(
[0] => Cabbage75
[1] => Frid75ay
[2] => Internet
[3] => Place75
[4] => 75Salary
[5] => 75Stretch
[6] => Whale75Inn
)
