preg_match(); - Unknown modifier '+'
2886
Warning: preg_replace(): Unknown modifier
63948
preg_replace, str_replace and substr_replace not working in special condition
7250
Reference - What does this error mean in PHP?
93418
+= operator appears to modify frozen string
7595
How can I convert ereg expressions to preg in PHP?
103037
How to convert preg_replace e to preg_replace_callback?
9559
Replace preg_replace() e modifier with preg_replace_callback
24465
What does = +_ mean in JavaScript
151441
PHP - Get rid of notation
94163
PHP regex - valid float number
25321
preg_split unexpected behavior
88909
How do I make this preg_match case insensitive?
147632
Regex phone number to accept +
29593
What is the "->" PHP operator called?
24483
plus/minus vs +/- in latex preamble
100382
Curly braces in string in PHP
125564
PHP regex delimiter, what's the point?