ereg_replace eat slash

[Xaradas]

Someone could tell me why preg_replace eat a slash when it do replacement?

<?
$stringToReplac e = "blah blah {nome} blah blah";
$replacement = "Two slash: \\\\";
$stringToReplac e =
preg_replace("/{nome}/Us",$replacemen t,$stringToRepl ace,1);
echo($stringToR eplace);

#
# It print
# blah blah Two slash: \ blah blah
#
# instead of
# blah blah Two slash: \\ blah blah
#
# Why it eat a slash?
#
?>

[Pedro Graca]

Re: ereg_replace eat slash

Xaradas wrote:[color=blue]
> Someone could tell me why preg_replace eat a slash when it do replacement?
>
> <?
> $stringToReplac e = "blah blah {nome} blah blah";
> $replacement = "Two slash: \\\\";[/color]

internaly, $replacement is "Two slash: \\"
[color=blue]
> $stringToReplac e =
> preg_replace("/{nome}/Us",$replacemen t,$stringToRepl ace,1);[/color]

Lets put $replacement contents inside the preg_replace (as php will do)

preg_replace("/{nome}/Us","Two slash: \\",$stringToRe place,1);
[color=blue]
> echo($stringToR eplace);
>
> #
> # It print
> # blah blah Two slash: \ blah blah[/color]

Right! preg_replace() evaluates the replacement like an ordinary string.

Try

$replacement = "Two slash: \\\\\\\\"; /* redoubled because */
/* it will be used twice */
[color=blue]
> ?>[/color]

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[Xaradas]

Re: ereg_replace eat slash

Pedro Graca wrote:[color=blue]
> Xaradas wrote:
>[color=green]
>>Someone could tell me why preg_replace eat a slash when it do replacement?
>>
>><?
>> $stringToReplac e = "blah blah {nome} blah blah";
>> $replacement = "Two slash: \\\\";[/color]
>
>
> internaly, $replacement is "Two slash: \\"
>
>[color=green]
>> $stringToReplac e =
>>preg_replace( "/{nome}/Us",$replacemen t,$stringToRepl ace,1);[/color]
>
>
> Lets put $replacement contents inside the preg_replace (as php will do)
>
> preg_replace("/{nome}/Us","Two slash: \\",$stringToRe place,1);
>
>[color=green]
>> echo($stringToR eplace);
>>
>> #
>> # It print
>> # blah blah Two slash: \ blah blah[/color]
>
>
> Right! preg_replace() evaluates the replacement like an ordinary string.
>
> Try
>
> $replacement = "Two slash: \\\\\\\\"; /* redoubled because */
> /* it will be used twice */
>
>[color=green]
>>?>[/color]
>
>[/color]

I've check your solution and it's ok but why using
ereg_replace I don't need to redouble?

<?

$stringToReplac e = "blah blah {nome} blah blah";
$replacement = "Two slash: \\\\";
$stringToReplac e = ereg_replace("{ nome}",$replace ment,$stringToR eplace);
echo($stringToR eplace);

# It print
# blah blah Two slash: \\ blah bla

?>

[Chung Leong]

Re: ereg_replace eat slash


"Xaradas" <NOSPAM@NOSPAM. NO> wrote in message
news:O2zDd.6521 65$35.26451258@ news4.tin.it...[color=blue]
> Someone could tell me why preg_replace eat a slash when it do replacement?[/color]

That's because the replacement string isn't treated simple text.
preg_replace() can insert captured result into the replacement string. For
sample, preg_replace('/I hate (\w+)/', 'I love \1', 'I hate Perl!') would
yield "I love Perl!" Because the backslash is used to indicate the captured
string, there needs to be a way of escaping it, in case you really want
'\1'.