php - str_replace is replacing all but 1 section of my string correctly. -


my original string looks

value='' tabindex='500'

i replace string

value='email:' tabindex='500' onclick=\"if (this.value=='email:') {this.value='';}

so use str_replace function 

$userform = str_replace("value='' tabindex='500'", "value='email:' tabindex='500' onclick=\"if (this.value=='email:') {this.value='';}\"",$userform);

my output ends being 

value="" tabindex="500" onfocus=" if (this.value == '') { this.value = ''; }"

if notice, except parts include 'value="email:" replaced correctly...

i hoping might have idea on why happening? appreciated. thank in advance!

you may looking like:

$userform = preg_replace('/value=\'\' tabindex=\'(.*?)\'/i', 'value=\'email:\' tabindex=\'$1\' onclick="if (this.value==\'email:\') {this.value=\'\';}', $userform);

result: 

value='email:' tabindex='500' onclick="if (this.value=='email:') {this.value='';}

preg_replace


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