[TYPO3-core] RFC #9994: Bug: ereg_replace is deprecated in PHP 5.3 alpha3

[Steffen Kamper]

Hi,

here is the same for t3lib_cs.

To clarify: as the var is concatenatet with a hash the possibility is 
there, that a digit befor/after can happen, which causes error. Using 
the bash-style (${1} instead of \1) ensures that this can't fail.
Personally i like the bash-style here more as it's better for reading, 
and may be the others should be changed also, but they are not as 
critical as the both follow-ups i attached.

vg Steffen
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